M A R C H 1957 Have fun with a BIPE

SUPER MERLIN

•8 c.c. .049 cu. ins.

£2.12.7

You can have hours of fun with the D.C. Bipe and building time is reduced to less than an hour. The ------Ί kit arrives complete with dope, cement, wheels and accessories. SPITFIRE Mk II All parts are accurately pre-cut and colour printed. It is merely a case 10 cu. cm s 06 cu. ins. of assembly, fitting the engine and A new and improved version of this undercarriage and away she goes! famous engine with all the original virtues of easy starring, flexibility and long life Designed for the Super Merlin maintained plus sparkling increased performance. engine the kit will take any engine from .5 c.c. to 1 c.c. and is available less engine for the modest price of 12/- including tax

------\ RAPIER MERLIN 8 c.c. 0 049 cu. in. 2*5 cu. cms. *15 cu. ins. For those with a tight A tw in ball race "International" class, high budget this is th e ideal performance diesel built for the rigours o , engine. All the virtues contest flying also suitable for radiocontrol1 of the Super Merlin, but without the excrafitcings. £ 2 .3 .1 0

DAVIES CHARLTON LIMITED HILL'S MEADOWS - DOUGLAS - ISLE OF MAN March, 1957 113

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HERE’S THE BEST VALUE ANYWHERE ! A range of 16 --TRU-FLITE'· Scale replicas of popular aircraft from which to chooee. Simple construction makes them Ideal for the new­ comer to aero-modelling. W ing spans of these kits range from IS” to 24* except the PERFECT GLIDER which ha· a tpan of 30*. Ask your dealer for detail· of the ••Tru-flite” Series. —Kits include: "Easy-to-follow Illus­ trated plan and instructions: SPITFIRE Plastic propeller, wheels and note bush: Ready formed prop-shaft. Selected materials. KITS / T e a c h ONLY 3I m (Tax paid) WILDCAT

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ASK YOUR DEALER FOR THE FULLY ILLUSTRATED /R EE VERON" POCKET FOLDER MODEL AIRCRAFT(Boumemouth)LTD. NORWOOD PLACE · BOURNEMOUTH ■ HANTS Z ir s ΗΌΜλ Telephone: SOUTHBOURNE 43061-WHOLESALE ONLY ac. 1957 March. * * * * * * * * * * * * * * * * * * * * ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ NES BROS. ES · edures- NES BROS LD, W.* D N A L G N E .I*„ .W S . N O D N O L , N O T R E M LTD., S. O R B S E IN L Headquarters:- · S IE N A P M O C F O P U O R G . S O R B S E IN L E H T ★★★★★★★★★★★★★★★★★★ iang n ri-a T o moe control. odel m for r s 'lZ , i l l w ' ' ' , 'AljZ, ls. tro of r e types v all o for - e g reversal n a h current c Double-pole rt ntl h aiu niiuluis Te ae ^ have They units. individual various the install to or ie x x i 1 . f I x 2 Γ Ι eight x W Γ Ι Size * . s. *ohm con- single to gives t and security n a circuits t simplifies double s n Y A I ulti-control L actuator», m E R reversible E gives IV IT S N E ent S ovem designed m E specially L relay O P - sensitive E L B U double-pole O first D orlds W G N A I- R T N O C en eind seilyfrte amn ^ layman! the for especially designed been aacd r trs ■ T^v^ar/ r a ^ v ^ T ■ 7000 atures. arm resistance Ralanccd Coil Pre-set. ^ not Is ^ knowledge Expert and mechanical efficiency. absolute on-electronic ensure inspected to and stage development every controlled at Tri-ang carefully is by and gineers, proved and tested control radio Tri-ang the of keynote the is Quality required either to operate the complete models models complete the operate to either required oesadcmoet. vr athsbe ul ^ fully been has part Every components. and models RADIO RC £18 0 SsT«e|lE l | e « T s NS 0 8 1 £ PRICE mesl sturdy. Immensely n dutbe ak ici eals upt o to output enables Megacycles circuit 27.255 tank of at adjustable all oscillate An frequency nder U only will spot-on aster frequency. Radiom e the th carrier conditions controlled rystal C tinuously variable Mark/Space ratio from from ratio con­ I. : .2 1 ith w Mark/Space to 10 : I circuits ately variable pulsing approxim indicator. t u electronic tp u tinuously o in and Built radiation In Built e thd o ay eil egh used. length aerial any to atched m be second. per TRIANG MARK I RADI R E T S A M IO D A R II K R A M G N I-A R 4T - T r u l gT v- TR • f I te>t s,Snl1 on lhe correct f'c- f'c- correct lhe on s,Snl1 te>t I f • ■ ceiver in the model to be be to model the in ceiver ■ ______TRANSMI ) R E T IT M S N A R (T Two alternative and widely widely and frequencies. pulse alternative separated Two Built in filter circ u it to elim inate inate elim to it interference. u T.V. circ filter in Built h Rdir.i - a assembled e- rods Rad iorr.ii' aerial the ithout W It som e d.itance away from the the from away d.itance without e som It ired t accurately ie8*χ^'ζΓ ζ ' ^ χ * 8 Size u eal g i* Ke- Ui«* 'g erabl. t>'us aimaster. Radiom RC £ 1 0 10 £4 PRICE l · L J

115 jL L j yL *

Totally enclosed in in case. plastic enclosed tough ad­ Totally ore m r o security double Large c u rren t d rop. rop. d t rren u c Large ircuit. C for Printed relay circuits. vanced sensitive ouble-pole D - G N I-A R T f I x 2* x ' J 3 Size installed. m itter. RETAIL PRICE PRICE RETAIL long for valve hard iniature Subm MK.II aster Radiom plete com Trans­ itter. MK.II ransm Tri-ang T excluding dventurer A but ith w plete British com M.S. dventurer itter. A m British M.S. steering co n tro l. Size 8’ x 3 ' x 2*. W eight I lb. 4 ozs. ozs. 4 lb. I positional ent, for eight W partm ent com 2*. attachm x ' 3 x attery b Special 8’ Size receiver, unit. l. tro n er valve co pow hard and steering with actuator plete Com ozs. | 4 plug· leads and including eight W w hilst th e m o to r speed may be varied, stopped o r th e ship ship e th r o stopped starboard varied, and be may midships rt, o p speed r to o m positions, e th ree th hilst has w er form The OSLAVE V A L S IO D A R 0 0 £4 PRICE ae o g tr Pce i eseil container. special e in radio. Packed sail. by to . ready controlled stern a go are r respects to to o all m made in driving and main tested and er d d ru batteries, Tha e th fitting She is fitted w ith the Tri-ang "Radioslave" and is, apart from from ship. apart is, cargo and large a 2 of is "Radioslave" odel m Tri-ang fine a dventurer the A and ith w ritish "B built, M.S. fitted is She precision controlled long, radio Tri-ang The w ater-proof cable easily easily oved. rem r cable o Tough attached con­ ater-proof w aircraft. of when trolling keying itter ote Transm rem For G N I-A R T D A E L N O I S N E T X E OMASTER E T S A M IO D A R RC £ 2 0______2 £4 PRICE ^C Sfflt] C .^ AIRCRAFT-RECEIVER RETAIL PRICE PRICE RETAIL Suitable for road vehicles and o th e r m odels. Easily Easily odels. m r e th o and vehicles road for Suitable to 6 6 to model Boats up to 2 4 ' in length (including speed speed (including length in ' 4 2 to up Boats model control and reversal by radio). Also steers boats up up boats steers Also radio). by reversal and control

TRI-ANG It. RC 4/11 PRICE

efcnand radio contained self / - h 0 1 S I ( W&r hs completely This J, % unit both steers and propels propels and steers both unit c o n tro l end pow er er pow end l tro n o c 19 0 3 iCll March. 1957 Fit a T R U F L E X and save money !

" hether I ' E & m a The tough flexible plastic prop that will outlast a dozen wood props. Also prevents damage to motor crankshaft. In sizes to fit all motors. 6 in. dia. x 4 in. pitch 9i in. dia. x 42 in. pitch 7 in. dia. x 8 in. pitch 3L· 9 in. dia. x 8 in. pitch 5/1* 8 in. dia. x 4 in. pitch 10 in. dia. x 8 in. pitch 6/- 8 in. dia. x 6 in. pitch 11 in. dia. x S} in. pitch 6/- more for yourm oney 8 in. dia. x 8 in. pitch 4/6 14 in. dia. x 6 in. pitch 12/9 g i v e s j / o u Fit and Forget T R U F L E X I K.K. M O TO R B O A T ACCESSORIES KEILKRAFT "SCREW-ON’1 KEILKRAFT PLASTIC SPINNERS FUEL CUT-OUT The perfect finishing touch for your power RUDDER „ EMytoIlt model. Positive action. If in. diam eter ...... 2/8j ASSEMBLIES 11 in. dia. 1/-; 12 in. dia. 3/- With ratchet tiller adjustment. 4 / » i 2 in. dia. 3/7 Large o r Small ...... each 6/9

ELMIC •LIMITANK' KEILKRAFT RUBBER WHEELS Som ething new In Fuel Tanks ! S tro n ily moulded In best quality rubber. Can be adjusted to give any A ••must*' for all power desired length of engine run ! model fans. With a Limitank you BOAT need no timer or Sponge rubber streamlined type. FU EL T A N K cut-out I 4 in. dia. 3/- 2 in. dia. ... Sponge rubber balloon type. I i in. dia. 3/- 2 in. dia. ... Hard rubber streamlined type. I i in. dia. 1/6 2 in. dia. 2/5 2J in. dia.

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Kindly mention AE R O M O D E LLE R when replying to advertisers March, 1957

fIRST AERONAUTICAL WEEKLY IN THE WORLD

FOUNDED 190 9 r* WEEKLY Is. 6d.

The Editor draws attention to the cutting below from the current Happy the lad who gets a copy of Bruce Robertson’s Aircraft Camouflage and Markings 1907-54. The volume of data con­ tained in its 212 large pages is phenomenal, and seldom have so many first-class informative illustrations been packed into a single book. Many are in full colour and the publisher has not even hesitated to use silver ink where appropriate to ensure complete authenticity. Air. Robertson has included everything that one could wish for in such a book, and more besides. Camouflage schemes of British and foreign aircraft, from the F.E.8 of 1916 to the Firefly unmanned targc*t of today, are shown in full colour, as are the current R.A h. fighter squadron insignia. Line diagrams depict the R FC· squadron markings of 1917-18, the French, Belgian and the U.S. squadron insignia that pointed the way to the This review, which high y-decorativc unit and individual aircraft markings of World appeared in the War II (themselves covered in detail later in the book) and December 21st issue current world air forces insignia. of “Flight,” is re­ hKUgC col|cction of drawings and photographs is accom- printed by kind ? u eSS comprehensive and painstaking editorial permission of the marking a m ! ^ ™d,vvhy thc various camouflage schemes and Editor of that T u h fc cn frh f,^ A nl5asurc of 'he author's enthusiasm for magazine. his subject is that thc appendices include complete lists of R A F Z i ^ n o n r i Z W3l 45' T ' ai " umb- a l l S s Y l , 2.54. the i , f 8jd ?lrs.h,Ps of 1914-19 and even the markings for British standard doping schemes of 1914-18. There are a few E fcfcffo^fboSkrtit ,n th' cap,.i.0nfs· bul thesc arc mere p.n- « I f - ^ i n ^ f o n ' b o ^ s S f°r m0dc‘· " ' ^ and Aircraft Camouflage and Markings. 1907-1954 ” hv limr* L'd -

PUBLISHED er « Λ SONS IT0„ DORSET HOUSE. STAMFORD STREET. LONDON, ,,,

GET YOUR COPY NOW FROM ANT - - i - / ; Rr ? ^ LFOBUSHERS AM,, T H IS IS ANOTHER “ HAR BOROUGH” BOOK BY PLUS 2s. HARLEYFORD PUBLICATIONS LTD., POSTAGE & HARLEYFORD, MARLOW, BUCKS, ENGLAND PACKING Variety is the essence o f a career in the R.A.F Besides flying some oj thejfinest aircraft in the world, aircrew can expect a diversity in their work unequalled elsewhere The spice of life

For the young man of today who wants to all the electronic devices in the new fly, to live an exciting and varied lire, the V-bombcrs. Pay? The new rntes give you Royal Air Force offers the perfect answer. an income comparing favourably with For linked with adventure, the R.A.F. most other professions: a Squadron Leader gives you the opportunity of Imilding a of thirty, with the increased flying pay and lasting career, full of achievement and full allowances now cams nearly £2.000 a satisfaction. year. And you join with the assurance if you wish, of a permanent career right up Your workroom — the world. R.A.F. air­ to pension age. Alternatively, you can crew fly constantly -and not just in this choose a 12-year engagement, with the country alone. On routine training flights option of leaving after eight years. In the you may breakfast in your home mess — first case you take hack to civilian life a and spend the night in Malta. Or you tax-free gratuity of £4,000! might go half way round the globe calibrating direction-finding beacons. Ilow to fly with the R.A.F. Because their And aircrew do much more than fly. For work is far from easy, standards of entry instance, examine the career of one for aircrew are very high. To begin with, particular Squadron Leader: from war­ you must be between 17$ and 26. and you time Bomber Command service to an must hold General Certificate of Educa­ overseas Staff College, then personal pilot tion or Scottish Leaving Certificate or toC.-in-C., Middle Last. .. R.A.F. Flying their equivalents. You must have the College Research and Development Flight character and ability to lead others. And . . . Aircraft and Armament Experimental you must have the aptitude as well as the Establishment . . . Acting Wing Com­ enthusiasm for flying. If you feel you have mander Flying, Bomber Command . . . these qualities — and feel you can develop two years with U.S.A.F. Strategic Air them further, fast write for details of On the ground and in Command . . . and now with the Air the schemes of entry now to the Air the air — a man o f many pans. Ministry Planning Staff. Ministry (AM.308b), Adastral House, with many parts to play. London. W.C.I. Give your date of birth And the future? For all aircrew, the pros­ and educational qualifications. pects arc of the widest scope. You may gain your first Station Command at 40. or be chosen to pass through the R.A.F. Stall' College, being groomed for the highest offices in the Air Force. Variety, achievement, reward. Through The Royal Air Force the Direct Commission Scheme, the R.A.F. offers young men a unique chance of blending the adventure of flight with the satisfaction of a great career. And Flying ...and a varied career more can now fly, with the new appoint­ ment of air electronics ofliccrs. highly skilled men trained to be responsible for r*

The world is your parish in the Royal Air Force. You may go to any, or all, of a score cf countries — to train, to observe, to command.

Here's a harder way to reach 10,000 feet, but it’s a part of training, part of a big plan to make aircrew even more self-reliant.

Young men between 17 and l‘> who have exceptional qualities of cade >hip may be p eked for the Royal Air Force College, Cranwell. 120 March, 1957

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^kObtainab/e from a//good Toy andHobby Shops and Departm ental Stores muniModels122 March. 1957 a e n THE BEST!

I h e Man who flies M ERCURY stands head and shoulders above modellers flying other kit models. In choosing M ERCURY he shows a discernment and appreciation cf design and quality that PS I MUSTANG could not be satisfied by any other k ts. Watch the man flying an Acronca Sedan or a Monarch. Observe his obvious pride and delight in its performance and appearance. If there is a badly finished Acronca or Monarch atout we have not WASP yet seen it or heard of it because M ERCURY M ODELLERS all take a pride in their machines and finish them MARAUDER accordingly. The M ERCURY enthusiast places design and quality first for these are the true criteria of value, not the price. MATADOR W e make no extravagant claims for our MENTOR range of KITS. ENG IN ES and Accessories. W e leave it to the W orld's Modellers to decide whether or not they are the finest in their class. If you have not yet constructed your first Mercury Kit. ask any modeller who has. and he will tell you Mercury Kits are the easiest to build and trim, have the clearest SIRIUS plans, wonderful flying characteristics, MARS and contain only the finest Balsa wood — in fact they are the best value you can buy at A N Y PRICE.

M O N O C O U P E M O N O C O U P E AERONCA SEDAN D.H. TIGER MOTH CHRISLEA SKYJEEP STINSON VOYAGER L.I05 JUNIOR MALLARD M A G N A ...... TEAL M A T A D O R A G R E SS O R P.5I MUSTANG WASP JUNIOR MONITOR M O N A R C H ...... MIDGE MAC THUNDERBIRD T E X A N ...... MENTOR S A T U R N ...... ALPHA ...... S I R I U S ...... PERSEUS M A RS ...... M A G PIE ...... GNOME MARTIN ...... GREBE MARAUDER

EXPORT ENQUIRIES : COURTNEY REED (EXPORT) LTD. Λ BRABANT COURT. PHILPOT LANE. E.C.J “Covers the world of Aeromodelling** Shades of “FAIt Accompli” ! VOLUME XXII W h e n w e f i r s t coined the now famous phrase that echoed the NUMBER 254 unfortunate deliberations of the F.A.I. Models Commission at M A R C H 1 9 5 7 their 1955 meeting we little thought that austere body would be dropping another equally unpopular brick almost before the dust Managing Editor - · - C. S. RUSIIBROOKE from the first had settled. E d ito r ...... H . G . H U N D L E B Y We refer to the decision made at their December, 1956, meeting Assistant Editor - - - R. G. MOULTON to hold the World Championship events in pairs on alternate years a decision that can only he described as an ill-considered and unfortunate compromise calculated to reduce interest in the class of models concerned. ★ According to the minutes of this last F.A.I. conference, pro­ cedure had been introduced to safeguard against any hasty or unwise changes to the Code Sportif. To put it in the vernacular, the principle of "hands olT the rules until world opinion has been Special features obtained”, was at least established as a result of the earlier furore. I low illogical, therefore, to follow this sensible procedure with "SOPWITH 1} S'rRUTTER" ...... 126 a foolhardy decision on a matter of basic policy which was not even IMPROVE YOUR PLASTICS ...... 128 on the agenda! The item on the agenda was the grouping of the four SOVIET AEROMODELLING ...... 134 Championships into one event, admittedly a subject on which there ••DUNNE TYPE TAILLESS" 136 is a wide difference of opinion, but all the more reason why a hitherto unmentioned alternative should have been left severely ••DUELLIST" ...... 150 alone. There arc 20 member nations in the F.A.I. Models Com­ A U S T R A L IA N N A T I O N A L S ...... 156 mission, of which 11 were present at the meeting. Six voted for this alternate grouping proposal, one against, and four abstained, including Great Britain. ★ But what of the other nine nations not at the meeting? The nations, strangely enough, most affected by the decision such ns U.S.A., Canada, Australia, New Zealand, etc.? It seems under new procedure rules, also voted at the meeting, that nations not repre­ sented are not entitled to a proxy vote. So here we have a situation Regular features where six Kuropcan nations, some of them representing very small numbers at that, made a majority policy decision directly affecting HANGAR DOORS ...... 124 nine other nations who do not even have the opportunity of dis­ ARMCHAIR AERONAUTICS ...... 131 cussing the matter. W O R L D N E W S ...... 132 We invite the F.A.I. Models Commission to examine their rules AIRCRAFT IN SERVICE—D.H. V enom ... 138 of procedure a little closer particularly in regard to proxy voting, M O D E L N E W S ...... 142 otherwise they c:m hardly describe their committee as international. ENGINE ANALYSIS— F rog 80 144 We also submit that this decision will he as unpopular with WHAT’S THE ANSWER ...... 146 European neromodcllers as with those in continents more distant, T R A D E N O T E S ...... 147 and provide still further proof that the delegates of many European RADIO CONTROL N O TES ...... 148 nations arc completely out of touch with the opinions of the AIRCRAFT DESCRIBED- 1 okker D R .l T r i­ modellers they are supposed to represent. plank ...... 152 Is it too much to hope that this second "FAIt Accompli" will KNOW YOUR ENGINE— F uel F eed ... 154 be rescinded and nations allowed to choose of their own free will, C L U B N E W S ...... 175 according to their finances, how often, and how many, World Championships they will support?

★

AEROMODELLER Incorporates the MODEL AEROPLANE CONSTRUCTOR and is published monthly on the 15th of the previous month by the Proprietors: MODEL AERONAUTICAL PRESS LIMITED On the cover . . SUBSCRIPTION RA TH: (Inland) 22,- (Oversea·) 21/- A D e M av INLAND "Sea Venom XXI "o f 890 Squadron per annum prepaid (including the special Christmas R.N.A.S. displays itself in Naval colours of dark sea N u m b e r). grey topsides and sky undersides. Black Witch-on- Editorial and Advertisement Office»: Itrooni insignia signifies the all-weather activities of this 38 CLARENDON ROAD, WATFORD. HERTS squadron, first to receive the Sea Venom for carrier T el e p h o n e : GADEBROOK 2351 (Mondey-Friday) service.— Official A dm iralty photo. US 124 March, 1957

Heard at the HANGAR DOORS ]Hiilti-eiitliUNiuNin We regret that space does not permit publication T he pair of control-line* Constellations in our of the many lengthy letters received on the subject, heading this month were but two of several very but we do confirm that without exception the large scale multi’s at the 10th Australian Nationals, writers are thoroughly fed up with the constant reported on page 156 of this issue. As also indicated and irritating rule changes which seem synonymous in Trade Notes this month, there is considerable with every F.A.I. meeting. Apart from the alternate interest in the type of scale controliner that can World Championship decision which emanated absorb an aeromodeller’s full stock of engines, and from this last meeting, there were suggested the APS plans for the Douglas Invader, D.H. alterations to both Team Race and Speed model Mosquito, Consolidated Catalina, II.P. Hannibal, specifications, none of which hail any worthwhile Cessna 310 and Dornier 215 are in continual motive behind them. demand. What would you like next? Drop us a As many people point out, the classic example postcard naming the next multi you would like to of a well-known formula spoiled by the meddlers see in Aeromodeller Plans Service, telling us the is the Wakefield, which in the immediate post-war power units you prefer to use, anil we will endeavour years was handsomely supported throughout the to meet the popular demand. modelling world. Now, one only has to study the Constellations above are by Stan Harlow at left, miserable entries at an Area Eliminator to appreciate using four Australian Sabre 35’s, span 5 ft. IA in., the decline of this once famous event. Where for weight 11Λ lbs., has been clocked at 86 m .p.h.t At instance are the once famous names—-Ted Evans, right is L. Quinn’s entry from Tasmania, span 6 ft. Eric Smith, Frank Holland, Ron Warring, etc., l l i in., weight 13 lb., with three Frog 500’s and none of them actively participating and all for one O.S.29. the same reason. So strong is the feeling in this country' about the Λ ο ι ο ι ι η η Ι ι -ΙΙ μ ι " on t i n » IB. It.4 '. Wakefield Trophy', for which, incidentally, the Younger Generation Parade interviewed Aero- S.M.A.E. are guardians, that motions have already modellers on Thursday, January 10th, and Dick been tabled at the S.M.A.E. Council Meeting Standing of Croydon and the “Ecurie Ncrk” demanding return from the F.A.I. combat group gave a good account of the thrills and This is not a hasty move by a hot-headed majority, hazards of streamer chasing. On the Wakefield and but a genuine effort by serious minded-modellers, contest side, Peter King put over the modellers’ who feel this most famous of all aeromodelling point of view very* well and we should imagine the events would be better serveil if it was controlled programme was well received by many who did by the S.M.A.E. and not the F.A.I. not have any prior knowledge of our hobby. Mystery item in the programme was the mention Till» Iioim ! S p irit of a 14-ft. span Delta planned for a Bristol Cherub engine, weighing 400 lb. bare and due to be built A D u tc h m a n may be responsible for the Isle soon by a group of aeromodellcrs near Croydon. of Wight taking part in an international model Hying From Aeroplane we gather that one of the contest in the spring. planners has experience of model deltas up to 10-ft. It begun when Mr. Ferdy L. Joosten, of Amster­ span. Those we should like to see. dam, went there for a holiday in the autumn of 1955. He was at that time secretary of the Bad- Ilainl* oil' the R ule»! hoevedorp and Sloten Aviation Club, and worked T o j u d g e b y the number of letters received for K.L.M ., the Royal Dutch Air Lines. following the report of the last F.A.I. Models In Newport one day he met Mr. “Pip” Thwaites, Commission in our January issue, the above slogan who quickly* discovered a common interest in should be painted in red and hung in a prominent flying, and invited him to the headquarters of the position at all future meetings of the Commission. Solent Heights Model Flying Club at Godshill. March, 1957 125

Mr. Joosten suggested that the two clubs should fly a “correspondence contest”. Both agreed to fly similar models on the same day and post the resulting times to each other. Two contests by remote control took place last year and both resulted in a tie. Λ few months ago Mr. Joosten, who married a Yarmouth, Isle of Wight girl, emigrated to Canada and settled in Montreal. He lost no time in joining the local model club, and was soon Plans, and a photo submitted for judging accom­ instructing the Royal Canadian Air Cadets. panied by a certificate declaring that the model He found Canadians just as keen on flying model had successfully r.o.g.’d. aircraft as they are in Europe. For instance, the First prize in this world-wide contest is S50.00, Montreal members use the airfield of the Hawkcs- and we are pleased to record that this sum has been bury Flying Club for their meetings. This is 62 won by Britain’s greatest all-rounder, John miles from the city, and a day’s sport means O’Donnell — sec photo above. leaving at 5.30 a.m.! Mr. Joosten suggested a three-corner postal International coverage contest between Solent Heights, his old Club near In the interests of presenting only the finest of Amsterdam and Montreal. I le is trying to get an model designs for your enjoyment, readers may have American club at Boston to take part. noted that this issue of Aeromodeller continues Isle of Wight members received the suggestion last month’s international theme. with enthusiasm, and plans have been made to fly The German Delta 707 designed by Herr F. W. the contest in May. Beistcrfcld has proved to be one of the most popular radio control designs, and American C. F. Stuby’s ΙιίοοιΙ news for m irrofilm irK Loening OL.9 sent from Thailand one of the most I ndoor f l y in g enthusiasts will be delighted to popular flying scale models in A.P.S. learn that the North Western Area have concluded This month we have an outstanding Spanish arrangements for the holding of a special meeting Combat model in Duellist, surely the simplest and at the Corn Exchange, Manchester, on the 13th most effective of ail designs for this purpose, and and 14th. April, 1957. Flying on the Saturday will which will appeal to all who are preparing for the be limited to test flying and record attempts, and onslaught of the new British Season. Adding to the three contests will be staged on the Sunday. These International flavour we have first news of the will comprise free-flight events for models of over Australian Nationals and latest information sent to 100 sq. ins. area and machines smaller than this, us direct from Moscow on Soviet aeromodelling. and a chuck glider competition. We understand Next month wc shall be introducing America’s that if application is made for other events, these leading Radio Control design, the famous "Smog will receive consideration. Hog” by Howard Bonner of Los Angeles and a full Pre-entry is required, and must reach the Area report on the New Zealand Nationals. Whilst on the Comp. Sec., Mr. J. Chadwick, 129 Mottram Road, subject of our contents, we thought that following Stalybridgc, Cheshire, not later than April 7th. the many kind comments received at the Editorial Offices on George Cox’s accurate anti finely detailed AeroiiMMlellin;;'* loss scale drawing, that readers would like to see the W ith thk passing away of Mr. E. C. (Ted) Muxlow picture reproduced below of George investigating of Sheffield, aeromodelling loses another very the Sea Venom F (AW) 21 at the S.B.A.C. Show, skilled enthusiast, and he will be missed particularly Farnborough. The results of his labours will be in the field of indoor and Wakefield class flying. found on pages 140-141. Ted ,who was only 34 when he died on December 6th, 1956, started his career as a Civil Servant, but since contracting tuberculosis at the age of 17 had not been able to follow any employment, and had been in and out of hospitals for years. Aeromodelling proved an ideal occupation, and we remember long correspondence with him whilst he carried on his hobby with a building board on his bed. His flair for lightweight construction made him one to be reckoned with in the indoor classes, and he held the r.t.p. record for no less than eight years.

J o Ih i ' n th e b o y O ur American contemporary Flying Models, recently ran a contest for the PAA-load Jetex design produced by Dallas Sherman, rules for which required a model to be built from standard M iim raia 126 March, 1957

Looking for a large stunt model to suit that 5 c.c. - 10 c.c. engine? Why not build this near scale 48" version of the famous Sopwith two- seat fighter? SOPWITH li STRUTTER B. sicm No a e r o p l a n e had a more peculiar name than this decking. Make up the sheet tail surfaces, mounting the first of all the famous two seater fighters. There is no tailplanc on the fuselage taking care to sec the push/pull known authentic source for the unusual title of "1J rod is adjusted to the correct length for neutral elevator Strutter”, but a study of the aircraft and its novel centre when the bcllcrank is also neutral. Now cut away front section strutting displays the obvious reason for this and rear cockpits and make dummy guns as desired. nickname which has eventually become an official title. The wings are perfectly straightforward assemblies, Designed in 1915 by Fred Signet and known first of all except that the spars are made first with Ά-ply braces as “Sigrist bus”, the Sopwith ” 11” first went to No. 70 let in to the centre section and being almost full depth Squadron in May 1916, and saw extensive action during spars, the construction is “egg box” fashion. If necessary the Hattie of the Somme. This was the first aircraft to the wings could be made in two halves and joined in the have a synchronised Vickers machine gun as standard centre afterwards. Care should be taken to see that the equipment and was built in large numbers at home and bottom wing is left flat for the centre portion. overseas (4,500 built in France). It was an outstanding When fitting the lower wing to the fuselage, cut away aeroplane and served in British, French, American, both the longerons and sheeting to accommodate the Belgian, Russian, Rumanian, Japanese services. spars, edges, then fill in the gaps with the removed por­ We selected the type as one of the eight most suitable tions, ample cement making the joint even more strong subjects for controlinc stunt way back in the A e k o - than before. With the lower wing carefully lined up (« m o d e i .i .e k of February, 1952. Brian Sichi of Ayr in little negative incidence would not do any harm—Ed.) and Scotland was influenced by this feature and built his allowed to set firm, make the rear undercarriage strut prototype for a brand new Frog 500. With this amount of joint secure on to S4, and finally sheeting the undersides power it certainly proved itself a fine flier and capable of of the fuselage, slightly rounding off corners when dry. mild acrobatics. For full stunt, it needs one of the The cowling is self explanatory, being a wrapping of American ”35” motors, and we venture to suggest that sheeting round circular formers, and fitting of the upper this combination of model and engine would be excellent wing is simplified by lining up the centre section struts for entry into most stringent of all controline acrobatic with the centre line of the ribs. This should give zero contests. incidence, which is further retained by fitting the inter­ What could be better then, than the Sopwith 1) plane struts, afterwards sanded to streamline section. Strutter, perhaps further embellished with the many The entire model is covered with heavyweight tissue details included in the long and interesting account of the and as indicated on the drawing, either R.N.A.S. or full size aircraft’s history by J. M. Bruce in Flight of R.F.C. colour schemes can be applied. Being a model for September 28th, October 5th, 1956? the more experienced enthusiasts, the details given on the It is best to start construction with the components A.P.S. drawing will be found self explanatory and enable after which this aircraft has been named. The ” 11” one to make a unique biplane, capable of flying through struts for the centre section can be made of soft wire, the full S.M.A.K. Stunt schedule, providing the engine preferably bird cage wire which is tinned for convenience power is of the 6-10 c.c. variety. of soldering and obtainable in 16 and 14 s.w.g. sizes. Also bend up the undercarriage leg assemblies and fasten to their retaining blocks and bulkhead F2. Assemble the forward bulkheads, FI, 2, 3 and 4 on to the engine bearers and mark out a set of longerons for appropriate spacer positions. These are then fitted to the forward bulkheads. Join longerons on the sternpost and add J square cross members and all other formers to complete the fuselage assembly, finally adding the bell crank mount. Now lit the C/s strutting wire and tank, then sheet top and side surfaces of the fuselage, adding stringers to top A ll a ife r r with Itlue/grey decking aignl/iea N.y.A.S. m a r k i n g « for Brian Sirhi’e prototype Sopu-ith 1} S tr u t te r Jilted icith a Frog 500. Note the genrroun tail Murfacea antI ideal proportiona of thia full Blunt model. SOPWITH I* STRUTTER

ncleBMOOCuu plans survxrt

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FULL SIZE COPIES OF THIS l/6 th SCALE REPRODUCTION ARE AVAILABLE PRICE 7/6 POST FREE FROM AEROMODELLER PLANS SERVICE. PLEASE QUOTE PLAN NUMBER CL 651 W HEN ORDERING CONTINUING N O TE S O N MAKING THE LATEST PLASTIC M O D EL KITS

F u lly ( / « o n i iftl ".4 rro· m odeller'’ leal nunlrla. .41 l, It. (/,, UNDBKRG F-IOt Sutter Sahre in rieid red, white ami blue decor o f the V.S..4.F. Th underbird Aerobatic Flight. Λole hatch to reveal internal engine detail. Right: modi· Jied FROG Sr aha irk fu lly coloured with detailed u/c on aupplied aland. Extreme right: LINDUt:KG Thun, derceptor built exactly u nupplied without extra d e c o ra tio n

L ast month we dealt with the that fine smooth finish on the structural improvements that it is original plastic if you attempt to possible to apply to the many plastic cover large areas with silver enamel. kits which have come upon the Thus forewarned, we should model market, and now wo are ready examine our subject and see what for the final and most important task the painting sequence should be in of decoration. order to obtain best effect. As The majority of the plastic mould­ mentioned last month, the interior ings are provided in the base colour should be first on the schedule, prior of the actual subject, for example, to application of the cockpit canopy silver to represent most modern air­ or perhaps even joining the fuselage craft, U.S. Midnite Blue for U.S. halves. Always paint the light Navy types, Olive drab for 1914-18 colours first, and you’ll find that fighters, etc. However, these base small mistakes can be hidden as you colours are not always truly repre­ progress with the darker tones. But sentative of the full size colour first of all, one must be properly scheme, and the fastidious modeller equipped. will want to decorate his plastic kit If you are aiming for the very best with any of the many special enamels of results and most detailed work, now available. then you should have three brushes. Flow patterns in silver plastic arc Size 0 in sable, which is stronger and particularly disappointing. They firmer, possessing more whip in the cannot be removed, and the very bristles than squirrel which is suit­ expensive moulds cannot be altered able (and much cheaper) for the to improve the position, so we have other, larger brushes, sizes 2 for to make an early decision as to average work and 6 for larger areas. whether to put up with them or hide The enamel can be any of a half- the minor imperfection with a coat dozen makes now on sale. Some arc of that hardest of all colours to apply mediocre, not living up to claims for —silver. Our advice is to leave drying time and are thus dust matters alone. You will never regain collecting—others arc perfection it- 1 ntcr-mixii·;^ chart (After tht scheme advised by RKVEl.L· Plastic paints)

Colour Colour O ra n g e 3 parts yellow S k y 4 parts white 1 p a rt red 1 part green (or blue & yellow) M a ro o n 25 parts red K h a k i 3 parts tan (light brown) 1 part blue 1 part yellow H u ll Rc

Add black to darken, white to lighten March, 1957 129 ‘'Ifasoiiaa

self, quick drying and free of brush any photographic dealer selling marks, ready to thin down with "dead" black paint, and though not specially provided thinners or tur­ always available in small quantities pentine in the case of oil paints, of $ oz. or so, can always be used for carbon tetrachloride in other cases, other models in future so that the especially when the smell is strange excess is not wasted. and not identifiable as either oil or butyrate base. In any case we One should endeavour to stick to strongly advise purchase of a small one make of paint for each model. quantity of carbon tet. from the Though we have tried them all. and Chemist (Thnwpit and DabitofT to date have only found that Revel I cleaners would do) as this is a fine cannot be applied ovrr (it is safe as chemical for cleaning brushes and the base coat*, say O’My oil base stripping colour olf a model in the camouflage, it is quite possible that event of a mistake. It can also be intermixing of makes can produce used to join some plastic parts V.uc ill-cflfccts in the surface. After all, to its slightly solvent action, so take the model trade has demanded a care not to rub too hart! when quick drying paint that is entirely cleaning the model with it for paint new in composition and each manu­ facturer has employed a different removal. formula for his product. Needless to say, keep the bottles or tins close»! up when not in use Safest check if you have any doubt, and remove the skin from oil paints is to try the paint or inter-mixed before use. In the unhappy event of colour on a spare moulding stem finding flakes of skin stirred up in from the kit. your paint, cover the paint with a Other “golden rules” are that one piece of Modclspan or Kleenex tissue should always remember that two and load the brush by pushing it thin coats are better than one heavy against the filtering action of the application, particularly with the tissue. lighter colours, due to poor coverage. Some of the new paints require Secondly, one should always be special attention, for example the patient and allow the first coat to latest Humbrol pack in capsule thoroughly harden before applica­ form. We advise a large tin lid which tion of the second coat. Thirdly, can he employed as an artist’s remember that colour usually palette, the capsule contents are darkens as it dries. Fourthly, don’t squeezed into separate areas, can be handle the job until it is dry, and let thinned or intermixed as needed. it dry in a dust-free atmosphere. The same am be applied to enamels ■old in narrow necked bottles. Our table, based upon the excel­ lent information supplied with the Revcll paint set, gives inter-mixing data for nil the colours we are likely to require, except perhaps "dead" black for tyres or cockpit interiors. 'Phis is nor among the model shop items, but can be purchased from 130 March, 1957

Where to find the colour informa­ gold Thunderbird insignia, brown tion? Some kits—notably the Frog di-electric panels, multi-coloured jet series, provide authentic camouflage engine, red tank noses, and black information with the instructions. afterburner variable orifice provide Others rely on the colourful box those finishing touches which make label which is usually very well the Super Sabre a model-painter’s executed. For most aircraft, suffi­ paradise. cient information has been published The Naval Sea Hawk is no less in the weekly Aviation magazines attractive in its dark sea grey and and A bromodeller , to enable one sky colouring with the authentic to obtain supplementary information “Ace of Spades” Squadron insignia, for a finely detailed colour scheme. etc. Here, we used a scribed line As the most demanding example, along the fuselage to get a perfect both for colour, and intricacy of division between the two contrasting parts we chose the Lindberg Super colours, and by using a fine needle

Above: RFAEU. U.29 turret« are lotcked trilli black paint. Nett RETELL type “ S " cement in back#round is genuine "non· Hiring” v a rie ty

Left: Malt black applied to I ROC Comet aerie» ThunderJet representing jet pipe

Right! FROG Seahatrk receive* last coat· ing of dark sea grey on tailplane trith N o. 6 fir lit A

llelotr: t **· a tin lid a.* a pnlrttr for late·! Uumbrol Capsule Rack, sr/ueesing for inter-mixing. LINDRERG F-100 engine in b a c kg ro u n d

Sabre for vivid red, white and blue point and ruler, we found that the decor, and Frog’s fine Hawker Sea scratch was easy to make, com­ Hawk for a camouflaged example. pletely disappearing when filled Both schemes have been illustrated with the darker paint, applied last. frequently in the Aviation mags, and One more point requires attention, arc typical of what can be used to especially if the model is to be made embellish the kit model. The F-100 exactly as supplied, without exten­ is one of the Thunderbirds U.S.A.F. sive painting. This is the question of acrobatic team. It carries red, white transfer adhesion, normally left to and blue striped tips and ribanded the gummed backing on the rear nose which is effective in itself. Add face of the transfer. Unfortunately, to this the white tail surfaces flecked the plastic surface of many models with blue stars anil red scalloped does not appear to receive the leading edge, plus latest style of transfer permanently, so it is advis­ large airframe number and U.S. Air able to use a coat of transfer varnish Force identification. All of this work Relou: Before and after, FROG Comet first. •eric* Cougar trith authentic decoration* was applied free-hand w ithout misk- applied. Silver leading edges red noae, Now, go to it, anil improve those ing, and the dark blue, white and irhitr letters plastics! March, 1957 131 [•MIMLB0

ColourK mill ('«ilrs Aircraft Camouflage and Markings ARMCHAIR AERONAUTICS 1907-1954 by B ruce R obertson (lla r- ungracious not to pay tribute to Mr. the pity is that drawings are not to any Icviord Publications), 45s. 212 pages. Robertson's immense industry and there common scale, and none arc to the popular Illustrated. can be no doubt th.it many enthusiasts will l/72nd size, nor are sections given. And Here is a hook to gladden the heart of owe him a dc it. of gratitude for years to while the Australians will appreciate the every scale modeller and military aviation c o m e —O .T . A.C.F'.K. Mk. VIII chosen for the Spitfire enthusiast. It is the first on military aircraft 3-view, perhaps the more prolific V's (6,479 markings since 1946, its scope is wider than m ade) o r .Vlk. IX (5,665 m ade) w ould have any previous publication and its author is A ir Him * C a r e r r been a more popular choice. well-known for his unrivalled knowledge of A irline Pilot (Edmund Ward Ltd.) 194-2(8) Many arc the hitherto uncovered anec­ British military serial numbers. More's the Bishopsgate, E.C.2) 8s. 6d. 94 pages. dotes attached to these 17 aircraft that pity then that its scholarly text and delight­ Illustrated. arc revealed by Mr. Green. We learn of fully rare photograplis, selected with skill Young aeromodellers aspiring to aviation F'W 190's losing engine cowls at high speed, and care, have not been accompanied by a as a career, particularly the plum jolw such of a .Mustang with Griffon engine behind the higher standard of reproduction and as a B.OJLC. Captain can learn from this pilot, and how an F'W 190 was used in Japan draughtsmanship in the colour plates. To to devise radial engine installation for the cite a few examples: the colours on the interesting and instructive little book how to e their foot on the bottom rung of the in-line Tony fighter. For such incidental Wellington on page 121 are nothing like the cr. They can also learn the arduous and gen. for mark number distinctions illus­ “sand and spinach" camouflage of 1939 ;the K exacting duties carried out by those qualified trated by fine line profiles, and for a fine yellow on page 103 is absurd; the plan-form to pin the golden wings and bars on the selection of photographic illustrations, ull of the Bulldog on page 52 is a travesty and modellers will be most grateful to the the camouflage colours of the I'okkcr D.VII familiar blue uniform. The organisation and technicalities behind producers of "Famous Fighters".— R.G.M. on page 34 should not be the same on upper and lower surfaces as shown. There is an a modern airliner and it» crew are admirably The W orld’s Fighting Planes by WILLIAM described in simple readable terms mainly extremely odd Me 262 on page 157, and a G reen and GERALD P o i.i.in obr (M ac ­ from the Captain'a viewpoint but also rather crudely drawn Sunderland on page donald fc Co.), IS*. 240 pages, sil­ 122, but the remaining plates reach a higher including th e d u tie s of o th e r m em bers of the houettes and photo. Illustrated. standard and the four pages of contemporary Most of our readera will already be aware Definitely the book for those who plan a R.A.F. fighter squadron markings will be of this title which has now been revised and particularly welcome. career in the cockpit.—H.G.H. reset, with the very latest information. The The text ranges from the dazzle painting Russian supersonic fighters, F'accplatc, of the Dunne biplane of 1907 to the Mig 15a For proMpprtive Fitter, Fish pot and Fishbed are among of the Korean War, and is unquestionably many new shapes within this handsomely authoritative being particularly detailed and A p p r e n t i c e bound 5-in. x 8-in. volume, and adherence interesting on 1914-18 aircraft and the to accuracy is evidenced by the author’s Jim Bartholomew of the R.A.F'. by introduction which explains the absence of batches built by sub-contractors. Line D uncan T aylor (C hutto St W ind us drawings illustrate the marking on 70 even more modern shapes, such as the Ltd.) 8s. fid. 138 pages. "Blowlamp", seen by only a few Western 1914-18 squadrons (as against 9,5 in Cam ou­ Had this reviewer been able to get hold flage 1914-18 A ircraft, published in 1943) delegates to the U.a.S.R. If you want a of Chatto & Wnidus's latest Career liook drawing of the Swiss P.1604 jet fighter, or with authentic serial number·. On foreign while awaiting his opportunity to join tl»e markings one senses that Mr. Robertson is perhaps the Grumman Tracker, the Tcmco 42nd Apprentice entry at the famous R.A.F. Trainer, or Spanish-built Dcwoitine 570 less happy, and there are some questionable Station. Halton, he would have devoured it assertions, for example, in the Italian among hundreds of other remote types, then word l>y word many times over. We have this is your reference book.— R.G.M. section. The chapters on inter-war R.A.K. always thought that little had been conveyed aircraft arc admirable on serial numbers but to would-be A/Λ hoys to entice even greater less good on squadron allocations. Neither competition for the limited annual entries, Coniosf Flier* Hi l>lr No. 247 nor 263 are mentioned under and this book will certainly tell any lad Gladiaiors (though No*. 17 and 223 which intending to join the R.A.F. just what kind 1955-56 Model Aeronautic Year Book never hail them are listed); Nos. 54 and 56 of a life he is destined to lead. Admittedly, by F rank Z aic (Model Aeronautic arc omitted from the Siskins and Noe. 41 it does not cover that specially exciting Publications N.Y. Box 507 C/o. "Aero- and 87 from the l urics. World War II atmosphere of inter-Wing rivalry: but that m odeller) 10». fid. 192 pages. aircraft get excellent coverage on the whole, is part of the Halton atmosphere best kept Throughout the years, Frank Zaic has though it seems regrettable that all the within the ken of those who pas* through l>een producing these yearbooks from his Spitfire Marks from II to 21 should be this finest of all the aircraft maintenance New York address -and providing contest dismissed summarily in four lines on page training schools in all the world.—R.G.M. modellers with food for Thought wherever 100, and that the colour sections should they are and whatever language they speak. contain no record of the tactical markings The style has changed slightly : but who can carried by daylight flying Lancasters and <■«‘11 fo r s o ImIn deny that this seasons collection of no less Halifaxcs in 1945. One is surprised, too, to than 129 of the world's leading model The Aeroplane Pictorial Review by find familiar errors about the Dll-7 series designs (all d raw n so .h a . you can co p y them Aeroplane S taff (Temple Press Ltd.), perpetuated. AH 431 to 529 were not or build them «κι. of the book), plus 29 7s. fid. 280 illustrations. delivered as Havoc I Is but as DB-7A* and independent features on subjects ranging Pictures selected from the pages of The subsequently converted to the 12-gun from F'rank Bethwaitc's r/c cliff soaring to Aeroplane published during and just before Havoc II standard at Bur ton wood. BJ 472 Parnell Schoenky on Helicopters, could be 1956 arc collected into one very inexpensive of No. 85 Squadron was one of the original other than intensely interesting to all who and handsomely bound volume, indispens­ Mk. Is and not a Havoc II. fiddle with dope and balsa? Yes. Frank has That this book will become the standard able for the keen solid modeller. Though all done it again, and all contest men will be work on its subject is all the more reason black anil white, the decor of just about cternallv grateful to him for his efforts. every modern subject can be accurately why a future edition should enjoy more —R.G.M. careful editing when one hopes to see a gleaned from the 280 fine pictures, and for number of irritating lapses rectified. detail such us tlie F'airey Delta 2 nose leg, A lexander Pope is m isq u o ted on page 5. the Viscount cockpit and Comet IV wing II. A. F. |»i«'turc« “ it’s” uppears where “ its” is intended with tank, the illustrations arc just what the monotonous regularity, Prestwick is re­ modeller wants.—R.G.M. Aircraft of the Royal Air F'orco (Air named "Prestwich" throughout. Wg.-Cdr. Ministry) Free on application. 28 pages. Bcamont becomes "Beaumont" and the T w o fi Illustrated. "Messerschmidt" beloved of the lay A nicely produced booklet which includes journalist is revived. The first D.H.9A* Famous Fighters of the Second World over 30 different aircraft in service with the were delivered to No. 110 and not 1(H) NVar by W ill ia m G reen (Macdonald Royal Air Force illustrated by excellent Squadron as stated whilst in a book on & C o.) 18s. 128 pages, 17 to n e draw ings. photographs and including brief technical markings it seems curious that many Illustrated. derails on each. captions make no reference to the squad­ This latest of the Macdonald Publishing Types include: Hunter F I; Venom F.B .l; rons operating the aircraft illustrated in House's scries of iiviation books will be a Venom N .F.2; Meteor N.F’.l I ; Meteor F.8; plates «nil photographs. Our old friend, must for all scale modeller. Though we Javelin F’.A.W .I; Canberra; Vulcan B.l ; the inverted block, has not escaped us—it’s would have liked to have seen the Boulton Valiant B.l; Victor B.l; Canberra P.R.3; the Hurricane on page 119. This latter Paul Defiant (which served in 13 Squadrons Meteor P.R.10; Meteor F.R.9; Shacklcton aircraft, incidentally, shares with the Turret- and surely deserves a place among the M.R.2; Sunderland M R.5; Hastings C.2; Demons on page* 82-83 complete anonimity famous) replacing the Me 110 or Japanese Valetta CM; Beverley C. 1; Provost T .l; in the captions. Nor has the common error "George", one must admire the extensive Vampire T.l I; Meteor T.7; Bnlliol T.2; of misquoting manufacturers' names evaded effort by both author William Green and Chipmunk T.10; Marathon T. 11; Pem­ us—for on page 80, ibe Avro Bison is artist Gcrt I leumann in producing such fine broke; Varsity T .l; Anson T.21; Dragonfly; wrongly attributed to Blackburn's. histories of the great piston fighters and first Sycamore; Whirlwind; Pioneer C.C.I Despite these shortcomings, it would be successful Jets. From the modellers angle. Devon CM ; Austcr Λ.Ο.Ρ.6. 132 March. 1957

A l l aerom odf. llf.rs will be pleased, we know, to learn that George Benedek has survived the recent revolution in Hungary. Only a few' days before the uprising, Hungarian modellers held their 1956 C /L Nats in Budapest with the following results:] 2.5 c .c . 5 c .c . 1 R . Reck 116 rn .p .h . 1 N . YitkovicK . 136 2 N. Vitkovics ... 114 fn .p .h . 2 E. Morwarth .. . 128

10 c .c . Je t 1 C. Czcfai .. 141 rn .p .h . 1 G. Benedek . . 154 2 X. Somogyi .. 139 in .p .h . 2 J. K rizsn a . 144 New national records, with thinner lines are 5 c.c. N. Vitkovics, 143 m.p.h. and Jet, George Benedek 165 m.p.h. Best time for a 10 Kilometre team race was 6 : 04, all of which shows that things were getting pretty warm in Budapest before that bid for freedom. Undoubtedly the first event of the year is always the indoor meet in Helsinki, Finland, where they use the big hall after the new years celebrations, on January 1st. Best times were put up by L. Fnglund who made 4:45 in the special class (see photo top left) and 8 : 06 in the FA I class. We understand that he is on military service and has little time for trimming, so these are good times. One of the largest clubs in our knowledge is the 150-member group at Oslo, Norway. Co-operation with the Aero Club gets them a regular meeting place for lectures (and Coca Cola!), while the main accent in summer months is control-line, due to lack of a flying field. W inter solves this small problem by freezing the nearby Bogstad lake, seen in the background of photos at left. Club Chairman Birger Bulukin uses one of the new Zeiss Activist 2-5 c.c. diesels for contest work and is said to be averaging 3 : 30 from 12-15 secs, engine runs. News from the Fast Zone of Germany, whence the Zeiss hails, is that model engine anti diesel truck engineer Otto Willo is now recovering from a nasty

Finlamlt In Army uniform, /„. F.ngluml iron liro indoor event* at Mew Year’* day merling in llrl*inki. Hr to w: on frozen llogstad l.ake, Otto, r/c flier· Fllingsen (David . I mlerten I c.c., HO· II), Phil in centre anil inderzen with old DC.350 euhin model. Other view from \oneay shows stunt experts Fllingsen (right) and David· Λ mlerten (l· ft) whose 2.5 engines power thin twin. Teuyoshi Takahaahi holds an Lnya 15 F.A.I. Ilethwaite type tie-sign below, also from Japun. is Fujii's McCoy 29 speedster for clockwise flying March. 1957 133

R iiK io n Petuhov attaint· d 1956 International context fperformance untl iron Crlterium o f hi trope, at right, \exic o f Yugoslavia prepares to launch in same context. .Ύn u lir a l scene it at the Pnlich Hydromodcl e v e n t heltl in conjunction irilh Yugoslav Cup accident involving facial injury. Otto has polio, affecting his legs, and suffered a fork breakage on his autocycle. Maybe that is why we have heard little of his products in the past year. Trend is to 1 c.c. and 1*5 c.c. units in the East, plus radio control. Commercial R/C units are appearing in many of both East and West zone manufacturers’ catalogues, including a suggestion of one 14 reed unit!! Already mentioned briefly in this column, was the 1956 Criterium of Europe for free flight power, at Subotica, Yugoslavia. Delayed pictures and a report have filtered through on this event where the U.S.S.R. swept the board, and a most amicable interchange of ideas took place. Greatest regret was that apart from Switzerland, no “Western” coun­ tries took part. Conditions were terrific: but there were strong downdraughts and these decided the winners. At the close of the 4th round, there were four ties with full max’s and in the 5th, George Zigic was particularly unlucky in being down- draughted from a great height. Estimated climb of Pctukov and Kun was to 330 ft. on 15 secs. E.R. First five placed as follows: 1 Petukov U.S.S.R. 180 180 180 180 180 900 387 2 K u n ...... I lung. 180 180 180 180 180 000 327 3 Kucherov ... U.S.S.R. 180 180 180 180 151 871 — 4 l η·] n u to. 141 180 172 180 180 851 5 Zitfic ...... Y ugo. 180 180 180 180 118 838 — After the event, a hydromodel contest, bathing and boating were enjoyed by all concerned. Where is the finest model living field in the world? Well, we’ve seen a few windless spots, and heard about Salt Lake, the Californian deserts, the ice in Finland, and then, of course, there is Chob- ham Common. From Peru, we understand that there is a vast desert where they fiy on packed sand, not very dusty, light wind and sweet miles and miles of absolute nothing. Moreover, its right next door to balsa country, Ecuador. If you think you can do better than that, write and tell us about your perfect field. Latent from V.S.A. sltote.» Cerrv Kit» abore irith 5% thick tring experiment for Oliver Tiger. High I// design is hy Kassel Hansen of Chicago Acronuts , has tlonr 75 sec», from 3 } sees, engine run, Y'.T.O. uith Oliver Tiger 134 March. 1957

AEROMODELLING

The following account of aero­ modelling in the U .S .S .R . today has been sent direct to us from Moscow written by “Aircraft Models Referee” P. Anokhin, and S. Malik. We feel sure that it will be of interest to modellers throughout the world, for it reveals how\ the Soviet modellers are keen to use Western ideas while at the same time their own modelling T w o o f Russia's Irttding aero· introduces use o f materials and modellers are tlaili nir Matvrjev (above) unit lean Ivannikov Hern at right, with techniques strange to Western eyes. h i · IWorld Record-holding jet.

AEROMODELLING is a very popular hobby organisation of Soviet aeromodelling and new rules (classified as a sport) among Soviet youths and the were introduced following the interest in the F.A.I. majority of the Soviet Union enthusiasts are school specifications of that year. This involved the use of children. Beginners get off to a good start by en­ a ‘’maximum” for the first time, limiting flights to rolling in special classes for aircraft modelling at 5 min, and again with the F.A.I. changes in 1954 school. In their first year of study they build very this was further reduced to 3 min. The F.A.I. simple models made of paper, then make kites and specifications were widely adopted and it took some build up wooden gliders and rubber-driven models time for the modellers to get used to the new of the very simplest design. regulations and to obtain satisfactory “international” In their second year of aeromodelling they branch standards. One main reason is that the climatic out into the competitive sphere by tackling rubber conditions for the majority of the Soviet territory drive more seriously and in particular the Wakefield limits the period of outdoor activity to only a few specification. In the third year they pass on to summer months. power designs, again with models to the F.A.I. At the 1954 Soviet International Contest held specification. Every summer, contests are held in in Moscow' the U.S.S.R. representatives did not every Republic and Region of the Soviet Union win a single top place in the individual classes, and the overall rubber champion for 1955 was although the team did place second in the overall Oleg Shagov a high school student. results. This event served to show comparative Some outstanding international records have efforts by other countries such as Czechoslovakia, been established and have been held several years, Hungary and Poland, and in 1955 the U.S.S.R. notably that of 3 hours 18 min. for glider duration standard improved considerably. Yuri Sokolov set up in 1950 by S. Ainadinov of Baku (capital of captured first place in the A/2 Glider Class at the Azerbaijan). In 1951 Nina Chebanova, a Moscow International Finnish Meeting, whilst in Czecho­ schoolgirl set up a World record for rubber drive slovakia, Vladimir Matvejev took first place with hydroplanes which has lasted for several years. five maximum Hights by his Wakefield. At the same In 1952 several radical changes took place in the International Meeting in Czechoslovakia, I. Ivan­ nikov (who was in the Wakefield Team in Sweden in 1956) set an absolute W orld Speed Record of 275*005 k.p.h. with his jet model and won the actual contest with a speed of 253 k.p.h. Gliders are by far the most popular class through­ out the Soviet Union, but have yet to show evidence of a “standard” design trend, although it is customary for nearly all designs to feature tip dihedral with very broad fiat centre panels.

1'iclorious Tram at the. 1956 Criiorium of tlurope for Power models. Left to right: Tram Manager, Prtukov, J e r m a k o v S u b o tin . a n d K u c e r o v March. 1957 135

Yuri Sokolov of Moscow is now working on a model to cope with the many varying meteorological conditions that prevail in the U.S.S.R. and he has already attained definite success in this direction. His A/2 model is distinguished for the thoroughness of construction and consideration of every detail. The wings of the model are in one piece, and he has experimented extensively with various airfoil sections both of his own design as well as that of foreign acromodcllers. It is interesting to note that Sokolov finally decided to use the type of wing produced by the famous Danish modeller II. Hansen, introducing only very slight alterations. T he entire model is made of pine and plywood with a small amount of balsa, used only for streamline tips and fuselage fairings. I. Ivannikov who comes from Frunze, the capital of Kirghizia, won the Tsiolkovsky Prize which is awarded annually for the highest speed attained by jet-propelled models, in 1953. He was not personally satisfied with the speed attained that year, and continued to develop his own pulse jet unit, with the result that in 1954 he was only 2 k.p.h. behind Josef Sladky the Czechoslovakian jet winner at the Internationals, and in 1955 he established the world record mentioned above. As in Western countries, the restricted weight of a Wakefield rubber motor prompted many avenues of approach to the problem of obtaining lengthy motor runs in this class. Pavlyuchenko is one modeller who has been building geared Wakefields for several years, but in the main, single strand motors as typified by expert V. Matvejcv from Lvov, in the Ukraine, are most popular. Vladimir Matvejev has been building for just over ten years and is very well known; he has established a remarkable standard of work­ manship using reeds and grasses and employing airfoils of his own creation with remarkably thin sections and high camber. He has experimented with turbulators, but disregards these in favour of extremely sharp leading edges and the unusual trailing edge form as presented in the sketch on page 648, December issue. The main idea behind Matvejev’s model is a maximum climb during brief motor runs and all emphasis is placed upon the minimum rate of descent during glide. His propeller diameter is approximately half the wingspan and during the 40-50 sec. motor run the usual high climb attains approximately 500 ft. Astute modellers will have noticed that the centre of gravity of Matvejev’s Wakefield is well behind the wing trailing edge! (re/, page 648 December issue). That the Wakefield requirements have been suc­ cessfully solved in Matvejev’s models, is confirmed not only by his successful efforts, but also by the results of other people who have adopted his design as a basis for building their own. This was illustrated particularly by the fine performance of the U.S.S.R. team at Hoganas for the 1956 Wakefield contest. FOR A»4. OHQV* »-C CNCINtS _ TCHtACS T*CIT OF W*» 3‘x sc* STRIPS ' We* so * U* — F 7 T DUNNE TYPE TAILLESS • · » ι·« ν ο » · • · ν « ϊθ XSC " ' \ DESIGNED «V • · S n 'x K tM 1 Η. E. Mayles PALE OF• SLOCKV^FCT tfiXl'ZVS" 2*XJ* c o p t h io m t or • CACHWCeSM wire _2L THE AEROMODELLER PLANS SERVICE PAIR Of lVZ*OiA WHEELS

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FOR PAYOUT I ACL NINOS I .PUOl.-ShCO ACHOMOOCcLCH MA*C> March. I9S7 137 ωΐΙΒΟΜί]

An ultra-simple model with flat plate wings and a unique planform, for any engine up to ■8c.c. Will fly in any weather— virtually crash proof.

T h e wenii«8 ca le DUMB T a i l l e s s by II. E. M ales

N o c l a im COULD ever be made for this unique carriage. To complete the fuselage, cover with heavy flying wing biplane to be a scale model, yet its grade tissue and dope as desired. Fit a washer on outline closely resembles that of one of the most your engine to take up end play on the crankshaft outstanding aircraft designs of all time. J. W. Dunne as necessary, and mount with washers under the experimented with tailless gliders having large rear engine bearer holes so that there is approximat­ sweepback, in 1905/6. In 1913 he demonstrated an ely 10 degrees upthrust (shaft pointing downwards). absolutely inherently stable machine with a 7- The wings are sheer simplicity, being flat plate cylinder rotary enigne, and remarkable though it section with the only complication of having was, official interest did not rise to the occasion. laminated root ribs to take the -jV-in. sheet tongues It was with the fame of the Dunne types in mind, and also having washout built in. Cut a long tapered that II. K. Males decided to make this simple sport template for the trailing edge washout, and pack flier for an Allbon Dart. W hat could possibly be this under the & x J-in. T.K. as each panel is made, more simple? There are no ribs to cut, the washout remembering, of course, to make one set for the required for auto-stability is locked in place by starboard side, with root fittings to the left side! interplane fins, and being a pusher, it is virtually Building in the washout saves a great deal of trouble, damage free as the wings knock-ofT in pairs. as the angle is maintained after coverifig. Build the It is cheap to make, will fly in all weathers, and fins in pairs, allowing for dihedral by chamfering collects a crowd wherever it appears—so if you want the tops and bottoms in each case. We are now to knock up something to shake the locals—try the ready for assembly—after covering and doping. Dunne, and you’ll never regret the few shillings it Apply a cement skin to all mating surfaces on costs to make. wings and fins. Cover with lightweight tissue but Start building with the fuselage which is little keep mating surfaces free from paste. Rub cement more than a “ bath tub”, having a block bow and right through tissue at these places. Assemble with enginemount in the stern. Two basic i in. square dihedral shown and £»vc two coats of dope. Insert sides arc made over the plan and faced by sheets of pins for retaining bands. lb-in. balsa on the respective outsides. Add ply Complete covering, doping. Fuel-proofing is gusset for tank mounting on port side, the scrap optional. Assemble model with rubber bands across supports for the engine mount, and cut and re­ undercarriage and between wings {sufficient to inforce the wing tongue slots. Join sides with the allow model to be supported at wing tips). Add lead engine mount, undercarriage block, the J-ίη. sheet to noseblock to bring C. of G. to position shown bulkhead which fills the rear end of the fuselage, on plan. and front top formers and spacers. Add all other Check wings for accuracy by sighting along fins spacers, stringers and noseblock, drilling the latter which should all be in the same plane. Don’t try for for the dowel to take the nose skid. Fit the under- glide. Hand launch with FULL power and enough

F n II nine p la n e f a r fuel for a five-second engine run. If model does thin eaay-to-hnild straight or diagonal loops increase upthrust by 5 flat firing laillrnn b ip la n e «■ r e a v a il­ degrees. If model turns too tight increase upthrust a b le an 1 /6 5 2 p ric e slightly. If she flies a straight, undulating flight 3n. front ,-t.P.S, path reduce upthrust slightly, this indicates that Drawing apponiie. in l/3 r tl nine either your engine or prop or both arc below standard. When a satisfactory climb is obtained increase the power run and trim for best glide by adding to or removing ballast. March. 1957

De Havilland D.H. 112 VEN O M W h il st no CLAIM has ever been made for the states . . chasing the better instead of putting the De Havilland 112 Venom to be anything more than good into production.” an interim aircraft, filling the gap between unswept Such could never have been referred to the Venom and swept wing all-weather fighters, one cannot series. T he first Venom F.B.l (VV612) flew on deny that in its seven years of existence, it has September 2nd, 1949, just in time to hit the head­ executed its duties with distinction. As this is lines for the SBAC show. It was a much developed written, Venoms are in the news as they go into version of the well-proven Vampire, designed to be action in the Yemen, and one must also call to mind able to make full use of the 4,850 lb. thrust De the recently published report on M.o.S. expendi­ Havilland Ghost turbojet, with thinner wings on ture. Too much time has been spent, the report what was basically a Vampire fuselage nacelle. T he leading edge had been swept back, and stressed for all manoeuvres with tip tanks fitted, so that inaction, the pilot could retain his full fuel supply instead of having to jettison. Today, all Venoms have this distinguishing tip tank feature, and a small slat is fitted to the leading edge close to the juncture of the tank and wing, presumably to correct the airflow at critical speeds. Provision for jettisonable underwing tanks, each carrying 100 Imp. gallons offers a very useful operational range, and the centre section and wing underside has become a suitable platform for rocket clusters, A.P. bombs or Napalm tanks. Gun arma­ ment consists of four 20 m.m. British Hispano 404 cannon in all variants, and in the two-seater N F and F (AW)—the AW standing for All-Weather and not Armstrong Whitworth—the nose cap of glass fibre moulding shields American Radar supplied under M.D.A.P. Such is the Naval and Military equipment that can be revealed to date. Following successful acceptance tests, the single- seater F.B.l with an estimated top speed of 640 m.p.h. at sea level, was put into production for the R.A.F. In Switzerland, the same fighter-bomber was built under licence (some 250 in number) as the Venom F.B.50 and this same designation was

Cotlr letter " O " on Sea Venom 21 Naval All U rather Fighter in heading Indicate» the mother ahip ia II.M.S, Ark llnyal. In thia official II. V photo, the l morn ia running up to full power, front rhocka are iloien antI the catapult will fire at any moment. Aircraft la front 809 Squadron, ha* gloaay ttlack and II h ile lip ta n k a

At left, the colourful aerobatic flight o f 890 Squadron are caught a.% they clim b in a form ation loop. Note rocket raila and tlifferenl " R o y a l Λ αr v ” boom markinga. /thick W itc h o n U ro o m ia Squadron inaignia, lllack and White chequered lip tanka, indicate aerobatic flight. (Admiralty Photo».) carried by those supplied to the Royal Iraqi Air Force. Progressive changes in design led to the F.B.4 entering production for the R.A.F., principal dis­ tinction being the loss of the hitherto characteristic De Haviiland fins and rudders, and the use of a pilot ejector seat. Internally, power boosters were fitted to the ailerons to improve rate of roll, and this version has been supplied in large numbers, starting with W R 374. The Venezuelan Air Force also has the F.B. 4 carrying its colourful red blue and yellow roundels. ITX 787 was the third production t enon, \F 3 for the R.A.F., Like the earlier Vampire, it was natural that the teen in makers odour· prior to delivery. In service, the radome nacelle of the Venom be adapted for two seats, and ,» usually malt black, not grey us here, \ i i i f camouflage pattern anti clean jet orijice trhich immediately dialinguish the land in this form it became specially suitable for Naval lutsetl t enant from it· carrier-borne counterpart. (D.ll. Photo.) use, with power folding wings, many of which have Below, the Sea Venom F ( A tt ) 20. identified by the extended been sub-contracted out by Folland’s. The second Inilplane aulltoartl of jin·, different u c blister· anti spacetl scat is slightly behind and to the right of the pilot, airframe number. This view of a prototype on lest shows the “ducks tail" arrestor hook housing, anti shape o f tip· when tanks like the piston engined Mosquito, and instead of a are not fitted. (0.11. Photo.) sliding hood, the canopy is hinged on its trailing edge. The French built version of the Sea Venom 20, known as the Aquilon or North Wind, differs in having a sliding hood to enable carrier deck take­ offs and landings with the hood open: but in the event of a dunking with the home built version, the canopy can be power-jettisoned. The first two-seater, N.F.2, was delivered to the R.A.F. before power boosted ailerons were fitted to what was later to become the N.F.3, now in current service. Some 81 Mk. 2’s were built, starting with W L 804, and the N.F.3 series began with WX 785. Both versions have been exported to Sweden, where they are known as the N.F.51 and 54. For the Royal Navy, first considerations in modifying the N.F.2 were the folding wings, arrestor gear and catapult pick up points. Added to this, the landing loads would call for different under­ carriage legs with longer travel, and all of this adds up to a much heavier aeroplane than the R.A.F. version. Leading edges of vulnerable components are protected from damage by the Carrier crash varrier, and a unique feature is that the under­ carriage legs have to be forcibly compressed as they retract, in order to get into the standard retracted position. Large hook castings under the wings and a fitting beneath the fuselage nacelle form the catapult harness pick-ups, and provision is made on R.A.F. counterpart, hence our selection of the 20 the booms for RATOG rocket attachment. Most and 21 for the two-seater drawing overleaf. Though distinctive of all the Sea Venom modifications is the the colours quoted include Sky for the undersides, duck’s tail with its upswept and not unattractive it may well be that latest deliveries may have white Hair to the rear fuselage, which houses the yoked undersides, following the scheme introduced on arrestor hook. some R.N.A.S. prototypes at Farnborough in 1956. T he F. (AW) 20 perpetuated the unusual vertical tail surface profile of the N.F. 2 and 3, also having The Xl·' 3 in service with 131 Squadron R.A.F.. has a white cross ouperimposed over u tlurk blue ground, within a black border, extended tail surface outboard of the fins. These cn either side o f roundel. It V 819 also slimes the smoother cockpit were tnken away on the Mk. 21 version which also sorer profile which differs from the Sea Venom blistered type. has two ejector seats and the pilot side of the cockpit (Air Ministry photo.) canopy carrying a large blister for higher seat position. T he first of the 21’s was W.M 569, and an export version sent to the Royal Australian Navy as F (AW) 53 began with serial WZ 893. By virtue of its differences, the Sea Venom has much more attraction to the modeller than its β fL. '.__ .«S 3 mu 7α ο § fiMUBSs) 142 March. 1957

Model News T h e l .S. N a t i o n a l s is perhaps the World's largest model meeting, and one can expect stiff com­ petition in every one of the many events- Hying scale included. Winner of the ’56 event at Dallas (open section) was Bruce Lynn from Austin, Texas and his model is none other than the popular A.P.S. Westland Widgeon, fitted with a *8 c.c. glow engine. Congrats Bruce!— and what a fine trophy to have on the mantle- shelf. He is now Hying an A.P.S. Spitfire XIV, which he says is the “most rugged freeflight” he has built. Lots of people write to A.P.S. asking for u combat model plan, and of course the Duellist on page 150 fills the bill as a specialist design: but those who want to knock out a toughie of their own, picture 1 will offer a clue, as it's the Leven (Fife) club design for stunt and combat. With a 40 x S ins wing, the name is Halley Comet -no Rock 'n Roll connection, designer’s name is George Halley. Owen Price is holding Ins version here. Picture & shows a model only one inch larger at 41 in. span, a scale Convair for two Darts by Michael Lovell (X. Lines. Club) being prepared for flight by anxious clubmatcs they wouldn't let him wait to add finishing touches before the successful maiden flight. Nice shot of a glider going up on the lines in 3 comes from P. L. Mander of Springpark Club, a difficult attitude for good results unless you haw a fast shutter. Numbers -I and *i arc. we venture to suggest, a Harlequin and Fokker D ili from A.P.S. They were March. 1957 143 Tjjfffirauua-i

also the winning models, by A. G. King of East Grin- stead Club, at a recent Hobbies Exhibition, run by the local Round Table. Nearly 250 entries of all types of handicraft were displayed at this three-day show, and the Kound Table are to be congratulated for the en­ couragement given by them to local modelling enthusiasts. We hope the idea spreads to other districts. Delta team nicer by Sgt. Woodrow of Notting Hill, is called the Viper and has the admirable perfonnance of 45 laps (on lOc.c.) at 81 rn.p.h., and won her first outing at the Northolt K.A.F. club meeting. Seen in <» we fancy those lead-outs arc a little far forward. Now to the glamour section and our charming ladies of the month. In 7 are the Whiston sisters, Eileen anti Sheila, from Stretford, Manchester. Accomplished model fliers, they are seen with Eileen’s Glo Bug c/liner which used to have an Elfin 1 -8 and now boasts an Amco 3.5—and just look at that elevator boys, then you’ll appreciate that Eileen can fly ’em. T he club is Urmston, in case you’d like to join. Above, in picture & there’s more glamour anti a very nice line in R6-B’s by D. M artin of Bognor Regis. Valspar Royal Mail Ret! and Atlantic Green, form the colour scheme and Mrs. Bette Martin strikes an admirable pose. Speaking of poses, get the one in il! 13. G. Turtle of Belvedere in Kent has a unique twin engined c/1 with staggered mounts and it appears to have staggered him too! Not that wc can talk we looked that way ourselves when we found that we had christened a “pusher" flying boat as a canard in last month’s Model News! 144 March, 1957

Analysis No. 31 a new miniature powerhouse from I.M.A.

FROG * 30 * Reviewed by R. H. W arring

Cast aluminium alloy cylinder head doet not give good anodised finish, hence the plain, un · colour a! appearance of this striking note pro­ duct from the Merlon factory (actual site photo)

T he n e w F r o g “ 80” is a truly delightful little sports more reluctant to start, rather it is a case that they arc engine. Smart and attractive in appearance, very well more “touchy” about mixture for starting. made and, by no means the least of its virtues, it sells at The Frog “80” is generally free from such troubles. a rock-bottom price! One reason for this low price is that For starting from cold it must not be flooded, otherwise considerable production cost is saved in employing an it responds readily. One or two finger chokes (at most) O-ring seal on a turned contra-piston (instead of the with the fuel line full draw in sufficient fuel when the more usual lapped in “contra” ). Another shilling or so compression can be advanced, as necessary, and flicking might even have been knocked olf the final price if a continued until the engine fires. The needle valve can be straightforward reamed bearing could have been em­ opened a full turn from the running position for quicker ployed, as has become standard practice with the larger response. We found that tending to start with slightly Frog engines. Hut in the case of the "80” the bearing is undcrchoking, and then flicking until the engine ran, more honed to finish, presumably because whilst a relatively foolproof than generous choking. If the engine is too wet, slack bearing does not adversely affect running, on the then it will not fire at all, when the only action is to close small sizes, no leakage can bo tolerated in this region the needle valvo completely and keep flicking. The without sacrificing easy-starting properties. crankcase suction is quite considerable, hence choking The use of a contra piston O-ring seal does somewhat also has a powerful effect as regards the amount of fuel alter the “feel” of this adjustment and on experiences drawn in. with other small (American) diesels fitted with O-rings, There is an appreciable change in performance as the popular opinion is to associate the employment of an engine warms up. The compression setting needs to bo O-ring with bad starting characteristics. Wo therefore backed off about a quarter of a turn from the “cold” paid particular attention to this feature in testing the position for optimum running, accompanied by a small "80”. It must also be borne in mind that starting but definite increase in power, which running it then characteristics tend to deteriorate on all diesels once holds consistently. And once warm the starting charac­ capacity is reduced below 1 c.c. They are not necessarily teristics are almost unbelievably easy. Both compression

F R O G “ 8 0 ” lforc: .400 in. Stroke:-390 in. D isp la ce m e n t: *804 c.c. (·49 cu. in. Bore/Strokc ratio: 1Ό25 Weight: H ounces Max. B.H.P.: 051 at ! 1,000 r.p.m. Max. torque: 5*4 ounce-inches at 7,000 r.p.m. Power rating:: *0635 II.H.P. per c.c. P o w c r/w c ig h t ratio : *025 B .H .P . p e r ounce

Material Specification: Crankcase unit: Light alloy pressure die casting Cylinder: Steel (no cylinder jacket) Piston: Cast iron Contra-piston: Mild steel (with fitted O -rin g ) Con. rod: Light alloy forging Crankshaft: Steel Hearing: Plain (reamed and honed) Cylinder head: Light alloy die casting (ny lo n in se rt for com pression screw ) Spraybar: Brass

ΛΓanufacturert: International Model Aircraft Ltd., Mordcn Road, Merton

Retail Price: 45s. inc. l ax March, 1957 145

and needle valve can be left as they are and the engine P ro peller —R.P.M. D ata merely flicked over smartly—to start every time. The running (warm) compression setting may be a Propeller little too low for starting from cold and so the general dm. x pitch r.p.m . rule for cold starting is to advance the compression from 9 x6 Frog nylon 4.500 the setting in which it was last left—and then reduce 8 x 6 Pros nylon 5.250 6 x 6 S lant again for final adjustment as the engine warms up. Over- 6 x 4 Stunt 11,000 compression when running is very evident from the 5 x 6 F rog plastic: 10,5181 laboured running. Host setting is with the compression 6x4 Frog nylon 12,800 slackened off to the point where “mining” starts, and then just forward enough again to eliminate the “miss”. Xote on Fuelt: Mercury No. 8 and Shell Powamix used on test. For slowing the engine the compression can he reduced On Mercury fuel the 80'· tends to run somewhat cooler, has a progressively over a further half turn, beyond which the Kreafcr consumption (needs needle valve more open) and requires slijthtlv less compression. R.p.m. figure* are up 400-500 r.p.m. on engine stops. The needle valve can he left alone during most propeller size», but starting and running is silently better at these adjustments. Provided the mixture is not too lean, speeds below 11,000 r.p.m. on Powamix. the “80" will run with the needle from “minimum lean” setting to the maximum unscrewed position (i.c. where although the smaller the prop, the more irregular the the needle valve is on the point of falling out). Rest per­ low-speed running. formance, of course, comes with the leanest setting con­ In the air the “80” has a tendency to pick up power sistent with continued running. more like a glow motor than a diesel, which is a point to Considerable attention has been given In the design to hear in mind if the engine is throttled hack for an initial easy starting and these desirable characteristics would test flight. Once under way it is likely to pick up into a certainly appear to have been achieved. About the only fine hurst of speed. It retains typical “diesel” characteris­ thing to avoid is flooding the engine. Since the ”80” has tics, however, in showing a slight preference for plastic excellent suction we would therefore suggest avoiding propellers over wooden types. using a gravity-feed tank on any installation os it would Constructionally the “80" features a most elaborate then be imperative to close the needle valve at the end of and well produced crankcase casting, incorporating the each run, unless the engine were mounted inverted. In lower cylinder and twin exhaust stacks. T he casting is to that case the fuel would merely cl rip out of the intake. Inverted running, incidentally, appears if anything some extent “stylised" in that the apparent transfer passages on each side are dummy. The only machine even better than upright. There is somewhat less likely— work done on this casting to finish is reaming and honing hood of flooding this way up, except that if you do the main bearing and drilling and tapping holes for the accidentally get the engine well and truly flooded, trying fixing screws. Radial mounts arc incorporated in the to force the piston into a flooded cylinder head in turning crankcase casting, blending into lugs holding the two over could result in damage. It would he advisable, there­ rear cover screws. The "80” can readily be adapted to fore, never to prime through the exhaust ports with an radial mounting by filing off the beam lugs and drilling inverted installation. through the cover screw holes to 8 R.A. clearance. These T he fact that the ”80” does run so exceptionally well holes are already tapped to full depth and drilling is only inverted makes it ideal from the “sports model” point of necessary to “clear" the holes to slide over fixed mount­ view for completely enclosing the engine in a scale-type ing screws. A point in utilising the beam mount lugs is cowling. Another useful feature is that it can be “throttled” t|uite effectively by slackening off the com­ that the (S R.A.) fixing bolts used should not he longer pression and it will also swing really large propellers at than J inch, otherwise they will have to be “worked" low speeds. O na9x6 Frog nylon propeller, for instance, past the exhaust stacks to get down into the holes (unless it will run at some 4,500 r.p.m. but with this load can fitted from under the hearers). There is, however, be “throttled" right hack to a slow and consistent “tick- adequate clearance for getting a screwdriver down on to over”. It will also “tick-over” on any other size of prop., the screw heads. (continued merle if) (■11*1 146 March. 1957

ENGINE ANALYSIS (Com.) WHAT’S THE ANSWER? The cylinder is of steel, with fins turned on, ground overall and internally ground and honed. During the A question on propeller efficiency latter operation the lower bore is slightly relieved. The cylinder wall is slightly thicker above the ports than below, the unit seating on the crankcase casting and scaled by a gasket. Two 8 B.A. fixing screws extend Ψ down through the head into tapped holes in the crank­ case. The transfer passage is provided by the clearance between the lower cylinder and crankcase casting with twin ports milled in the cylinder walls immediately below the exhaust fiangc. T he two exhaust ports are diametrically opposed feeding into the stacks and giving about 360° opening. The cylinder head is a light alloy diecasting incor­ porating a nylon insert to act as a "lock” for the com­ pression adjusting screw. (Being a casting alloy it cannot be anodised satisfactorily). The contra piston is turned from steel and Hanged so that it cannot drop down Bill had a little 32 in. span radio model powered tv a McCoy ·04'> diesel. With an all-up weight of 18 ounces inside the cylinder. T he synthetic rubber O -nng is fitted it was generally agreed that power would be marginal and in a groove near the bottom of the contra piston. When so we f o t down to some bench tests with different propeller)» new it is quite stiff to fit into the cylinder (despite the to decide on a size which would let the ‘‘Mac’’ operate at the r.p.m. figure corresponding to peak brake horse power— generous chamfer entry), but after some running time is as Riven by the cnRine analysis Rraph. more elastic and easily re-fitted. The O-ring itself The prop, finally chosen was * 6 x 4 nylon, trimmed a appears to have remarkable durability and is much little, but all we could Ret out of the model was a prolonged “powered glide”. In desperation we finally tried in 8x4 tougher than the silicone rubber types favoured by wooden prop, which somebody happened to have with American manufacturers. It should, therefore, have a them when—hey presto!—a snappy climb! long life (and, in any case, a replacement even if neces­ Now we checked the revs, with the 8 x4 and they were some 5,000 down from peak power. How come that we got sary is cheap and simplo to fit). such a better performance with the “Mac” operating so T he piston is of cast iron with relatively thin walls and far below peak? W hat’s the answer? quite light. It mounts an oversize gudgeon pin (| in. diameter, a size common to 1*5 c.c. engines) together What would YOU do with a long little end bearing. The light alloy connecting in a case like this! rod is a forging. Think a moment The steel crankshaft is } in. diameter with a bearing then twist this page length of J in., reduced at the front end to a 3 B.A. for the solution to thread. T he crank pin is & diameter. T he crank web the problem is quite thick and purely circular (i.e., not counter­ p rin ted balanced). The light alloy prop, driver is internally below splined to force over a spline on the crankshaft. Propeller nut and washer are “ blued'1 steel.

T he needle valve assembly is angled back (to the right) A •■staggering” perform ance and slightly upwards, consisting of a standard “150” size spray bar and needle, tho needle thimble being isos pue 9 x 8 ub jo pvaisut qof uo|Xd » u o £ x 6 a Aj t locked by a steel spring ratchet. Although the needle •urdu Sutiruado qJtiq AjqBuoreaj r uiojunmi oj sazis qajfd auy Xjoa 0» u.wop JhiioJi wnraui 11 Ji ua.\a ‘eqof iqJMy-aajj uo does come almost in line with tho exhaust it is in a aiqissod ja in u o tp jayadoid jsa»ju| aq» a*n 0» sAed u a jjo »j convenient and comfortable position to handle. uauJiiq w-.\\ painjauaS »«ruq» 8ui)|nsaj aq» ‘pasn Huiaq sbm ja.wou audtua s*9| qXnoqi uaaa As to performance, the "80” ran smoothly, consis­ juq» auo J9|ieuis aq» uvqj juapyja aioui tpmu »«q» uaaq tently and well over a range of speeds tested from 4,000 a,\«q pinoa pa*n jayadoid jaH-iej aqj, 'azt» jajoureip qii.w up to beyond 17,000 r.p.m. Peak power is developed Suisnaiaap AjujijiJTj ia n a d o jd 10 uousanb aqj oijb si a ja q j, around 11,000 r.p.m. but the fall off in power with nil ms -urdu OOS'ZI w o q n » λι3» az!s -railroad * Iubm pjno.w n o \ -jjBad increasing speed is quite small. In other words, good aq» »eed |p.w *■»·! -u rd u OOS’SI °Ί!Ι 8utq»auioe Jtuiop aq torque output is sustained right up to 16,000 r.p.m. Ayvniav 111 .w ja y a d o jd »«q» jib aq» uj ’anm* ‘ urdu 000Ή *a.\iSf qatq'M -dojd w q»iM 11 »y ηοΛ pu« - u r d u 000> I '*■· T he power curve classifies the “80” as essentially a *»B βηβ.κΙ qaiq.w audtua uw a.xeq no.< j i WWf.I. 'aunXy oHma-ie sports motor, in which category it should give a satis­ u e 8wpq -jiiaa »ad 0 1 J ° p M d l ui aseaJOUl u«— paanpa» ftuiaq joyatlojd aqj uo peo| aqj 0» a n p 1 jsojjjui - u r d u factory performance on almost any size of propeller you j,i|jadojd jqJhy |en»a* uj -suoijipuo:» aije»s japun paunujajap would care to fit. The new Frog plastic 5 x 6 propeller aau tauiSua ppouj jo j «a.iina aauimuoj-iaj is a "matched” control lino size, and would appear just about right. For free flight a 7 x 4 would appear the optimum size, or possibly an 8 x 3. But for a really smooth, docile, performance, try a 9 x 6 Frog nylon. It is quite a revelation just how flexible this remarkable little engine is. Summarising, we can only suggest that Frog’s have produced a real winner for popular use. It is a low price engine with high class appearance and performance which has undergone a lot of development work to make it easy starting as well. Beam mount fixing dimensions, incidentally, are identical with that of the Frog “50” and Allbon “Dart”. March, 1957 147

airwhecls. Six pusher props, six Each year the KcilKraft I land- TRADE NOTES tanks, transfers, two large blueprints book and Catalogue is revised and 7 ft. x 3 ft. and yet more, more and brought up to date to cope with the What is undoubtedly the more bits and pieces that go to make many new items introduced annually largest model kit produced anywhere a 10 ft. span, 6 ft. 6 in. long B-36 to the vast KK range. The ’57 issue in the World, has recently arrived in with six Oliver Tigers and four also has a change in face, for it is now separate parcels at the home of Mac Jctm asters for industrious Mac a 5 in. x 8 in. landscape production Grimmett at West Bromwich since Grimmett. Model should be seen at (pages longer than deep) with 56 the entire kit weighs 30 lb., the this seasons meetings, and is the only pages against 48 last year. Our only postal authorities would not accept one in Europe, there arc some half- criticism is against the thinner cover, it in one piece! It is the Japanese dozen others in the U.S.A., more in and being in the publishing business E ureka kit for the Convair D-36 ten- Japan. we fully appreciate how the price engmed bomber. Cost in the U.S.A. has had to go up to Is. 3d. per copy. is $39.95 (approx. £30) and some­ Now while we do not in any way suggest that this momentous effort It is full of hints and tips, from a what less in Japan. It is prefabricated, Glossary of modelling terms, to how with cut out ribs, spars, formers, should be taken as a yardstick for British traders to follow, we do to fly control-line models, and etc., all from light Japanese Kiri should, we think, be an automatic wood, and the only balsa com­ suggest that the first British manu­ facturer to put out a scale multi, just sales item for all aeromodelling ponents arc the elevator ribs and a beginners, particularly those starting lew block parts. Quality and quan­ twin engined, will be filling a big gap in the market that the modellers off with ideas in advance of their tity are astounding. There are ten capabilities. Incidentally, those KK spars in the wing, some three inches would be quick to appreciate and we learn that there’s u Mercury plastic Bobbins mentioned last deep and j| in. thick. Fifty sheets of month and pictured below, left, are i-m . balsa is supplied for planking, Lockheed Lightning on its way—good show! ideal for radio control receiver there are two large and fully sprung Quench coil cores. main gear legs, each with four scale A complete and ready to fly glider One of the finest transfer decora­ that shows intelligent use of vacuum tion sheets we have seen for a long plastic moulding, is now available while is the special P-51 Mustang through Scbcl Products of Frith, sheet now issued by Mercury Kent. Retailing at 4s. 1 Id., including M odels Ltd. in their kit. Retailing tax, the Gull is semi-scale, with separately at Is. 6d., it carries not printed balsa sheet wings and tail, only international insignia and and a specially strengthened hollow squadron lettering: but also those plastic fuselage and fin. With the hard to paint diagonal red and white model there is a length of elastic for stripes for the fin and rudder . . . catapulting, and we can confirm that plus a neat reproduction of the it really is ready to fly. Mercury trademark. Markings are Each year Contest Kits Ltd., “spot-on” for accuracy and colour awards prizes for successes gained rendering. with their products—a nice sales Most of our radio enthusiasts cncourager. 1956 award went to B. know that Messrs. Odeon Radio Comey of Harpenden who was 1st supply various parts for the “Aero- in R.A.F. Training Command Λ/2 modeller’’ Receiver, including Aerial and Open Championships plus the Coils, Quench Coils, R.F. Chokes, Final R.A.F. Champs with his first etc. Odeon are now offering the contest model, an inch Worm. For same service for the Hill Receiver, his efforts he received a suitably and we illustrate below, the Aerial inscribed 8-day clock. I leading the Coil which sells at 3s. 6d. and the list of winners at the East Anglian Quench Coil at 5s.!! Also available Area Winter contest was C.K. at 2s. 6d. is a pre-wound R.F. Choke, Director M. A. King with a Calypso and we would mention that the rest Major, first indication of what may of the components for the Hill outfit be a new kit. are also available.

L e ft: T o p lu B o tto m : K K T e ry le n e ί. I. c o rd f o r s m a ll trainer» is cheap at 7Id. per 100 ft.: hut take out the 10 /ter cent, stretch before tt.ting lit Next i« th e S e ltel Hull ready made glider at 4m. lid. trith plastic fuselage. Hevell plantic paint kit at Hs. l i d . I» n e a tly p a c ke d , include» a brush, thinner» and eight eidourn trith inter­ mixing data. Paint is superb for all ptnatic kit model». .Ym I: Mercury’» Muttang transfer sheet for I». 6«/., and bottom, the KK Plastic b obbin» a t 3J«/. to Sd. each. 148 March. 1957 RADIO CONTROL NOTES

II.NI.V. Itm lio VV. G . R o w k l l , who at one time produced the Rowell 10 c.c. racing engine, has been carrying out practical tests for us with the H.M.V. Zew Zealand radio equipment. T his he installed, appropriately enough in an R.6.B shown opposite with fair assistant. The receiver was mounted in sponge rubber with a small outlet hole for tuning. The H/T consisted of four to make a low approach in order to take a photograph, 221-volt battery units made up into a 45-volt pack. crashed the model. The fuselage was more or less a A standard 14-volt Deaf Aid cell provided the low “write-off" but the receiver and Relaytor were still tension, and the II.M.V. Relaytor was mounted in working merrily, which says much for the robustness approved fashion. Initial tests on the bench disclosed of the gear. a standing current with no signal of 4 milliamp rising on receipt of a signal to 9 milliamps, which was the maxi­ Hoflificationw to the m i ll mum that could be obtained. The Relaytor was tested separately and it was found that this would operate on To judge from the letters and photographs we have just under 6 milliamps, giving a safety margin of over received from ail over the globe more examples of that 3 milliamps. enterprising layout by Alan Rowe have been built than On the field the radio was tuned at alxmt quarter of a any other design. Several people have suggested im­ mile range to give maximum rise, after which it was provements including Mr. Rowell, and the one men­ checked on the ground at half a mile range, and at this tioned by all is the need for strengthening the fuselage distance was still giving 84 milliamps current change. structure. T he “A/M** drawing office has therefore In operation in the air the set was completely reliable modified the plan by deleting the diagonal braces and and as the makers claim, can be installed and forgotten filling in the top, bottom and sides of the fuselage with about. ith sheet balsa back to a point opposite the trailing edge Finding the set so reliable, Mr. Rowell began flying of the wing. The whole fuselage is then covered with much too near the ground and in the process of trying 1/16th sheet. The motor mounts as originally specified need strengthening, especially when using motors around the 2*5 c.c. to 3-5 c.c. mark. This is done by using good quality f-in. five-ply, preferably the resin bonded variety. T he motor lugs are then fixed to the inside face of the mounts. Some people have had trouble with the sheet balsa fins warping which is easily cured by an insert with the grain running in the reverse direction. Those people who like a fairly quick response to rudder movement can increase the crank movement by almost 100 per cent., although novices would do well to leave things alone until they have gained experience. One thing we do not recommend is modifying the twin fins to a single fin. A certain well-known radio enthusiast who shall be nameless, tried this with dire results! Fitted with an F.D.2.46, the R6-B gives a lively per­ formance, the advantage of this particular engine is that it can be fitted with a pusher prop by simply turning the back cover through 90 degrees which permits it to run backwards.

InteiTVreiM'e from lli^li ΙΤημιπΗ^ S p a rk s Reader R. Wilson of Hyde was recently flying on the sports field of a large steel firm using the new Triang Mk. II crystal controlled outfit for which ho has the highest praise. To use his own expression, "the equip­ ment suddenly went haywire”, only to resume normal working a few moments later. Subsequent investigation showed that a large and powerful electric welding plant in the steelworks was completely swamping the normal signal, the range of the interference being up to two miles. Another of his receivers was similarly affected giving no satisfactory “drop” or “rise" and becoming over-sensitive. The Editor was recently watching a March, 1957 149

here who have readied the stage of considering ailerons l e f t . „ >r. c. we pass on some very precious "pearls of wisdom” Itoirell'a R6-II regarding their practical operation. Because of the uaeil for the flight greater drag of the "down” aileron compared with the Ira te o f th e II. M. \ . iSete /.calam i ratlin "up” aileron, when both arc moved the same distance, equipment. IS ate they must be given a differential effect to prevent yaw the built-up Jin* in the wrong direction. The boys have various schemes u'liirh Mr. liourll prefera to the aolitl for doing this which we hope to publish at a later date, *heel variety ori­ not the least crafty, being the simple method of building ginally nperi/ietl. the aileron with the upper surface longer than the lower. Right, the German Or to put it more simply, by leaving a large cutout “Vee” O-reetl unit mono- between the underside of the aileron and the wing, with f a c t o r e d b y the hinge on the upper surface. Marlin I’feil nf llilileaheim which Seems the "Larks” are also suffering from interference i a beautifully due to sunspot activity reaching its peak. Somehow or other this magnifies Ham radio signals operating legally here a p p r o x i ­ mately full aiar. on 27-212 lines., sufficient to operate the average broadly tuned super-generative receiver. By using a pair of headphones on a Babcock receiver, the "Larks” actually picked up a call sign from a Ham the other side of the States who confirmed he was using a 50 watt transmitter on the correct frequency. We can just hear conversation following the first spin in nt the British demonstration of some radio equipment in Messrs. Nationals. "Nothing wrong with my equipment, old Hi vacs factory when a high frequency spark of some sort man. Must be one of those Yank Hams and a sunspot!” went into action in an adjoining department. This Another interesting item mentioned was the Orbit 8 immediately operated the receiver in question, which channel simultaneous equipment manufactured in was tuned to 27 megacycles, and there seems to be no Lynwood, California by Bob Dunham. Transmitter doubt that the high frequency spark, emitted by welding uses two toroid coils (amongst other things) which keep machines anil such like, put out a whole range of fre­ it completely stable throughout all battery voltages with quencies and harmonics of considerable strength. There no drift off frequency. The receiver has one detector appears to be no means of suppressing this type of tube which draws 10 milliamps anti two transistors. equipment, the only thing one can do is to find another It idles at 1-75 milliamps, measures 2 ιιΛ in. x 2| in. x 3i in., and weighs 9 ounces less batteries. Brice of flying field. receiver is $119*50. flow many do you want! Men Germ an lleetl I Hit Before leaving the "Larks” we would mention that Howard Bonner’s famous "Smog Hog" winner of the We have been sent a sample of a new 8 reed unit 1956 American Nationals will be appearing in our next being manufactured in Germany by Zungen-Relais issue with plans available through A T S. in the usual which is shown approximately full size in the accompany­ way. Howard together with Bob Palmer the American ing photograph. Weight is 47 grammes (1-65 ounces), Stunt Champion will lie going to South Africa in April sensitivity at operating voltage of 5 volts is *6 mW; to give demonstrations sponsored by Monty Malherbe lowest operating voltage is 3 volts with sensitivity then of "Jix Models”. On their return journey early in May down to 3 mW impedance at 400 megacycles is 40,000 they will probably be visiting this country, when ohms and the D.C. resistance 6,000 ohms. Switching Akromodeller hopes to arrange similar demonstrations frequency is between 280 and 400 megacycles and the and a general get-together between I Ioward and Bob and spacing 15 megacycles; operating current can be up to British enthusiasts. 200 volts, both the coil and the contacts having been safety tested up to 380 volts. The unit is extremely well made and the manufac­ turers are prepared to supply them in pairs tuned to avoid co-interference. There is the possibility that they tnav bo available in this country in the not too distant future. I p with the ‘•LjirliJ»·’ For the benefit of the uninitiated, the “ Larks” Club hails from I .os Angeles, L’.S.A., and is probably one of the biggest and most thriving radio control clubs in the world. We regularly receive their News Letter which is quite a "Radio Control Notes” in itself. Amongst its members it includes such well known people as I Ioward Bonner winner of the radio event at the 1956 U.S. Nationals and many other experts. With the advantage of almost perfect flying weather the whole year round (just imagine it!) the flying standard is pretty high. This latest letter includes some useful sketches on aileron installation and wc read of Chuck Boyer and Bill Scgelken doing low altitude rolls. Not just one, but a continuous series of rolls finishing back at the same altitude they first started! For those experimenters over

March, 1957 151

g e t i n t o t h e c o m b a t CIRCLE WITH THIS SUPER MANOEUVRABLE ALL-WINS FROM BARCELONA BY ADOLFO TRISTANY

Joue C arr la Fleur n- hrimrr iron laet yrar’a Criterion» of Europe uilh The DUELLIST

WINNER OF the 1956 International Combat edge and then upper spar in that order, reinforcing event at the Critcrium of Europe, Brussels, this trailing edge joints with And gussets. remarkable Hying wing is the result of specialised After lifting from the board, fit the bcllcrank design by a group of acromodellers in Barcelona. mounting plate and And sheet braces, then the tip The Spanish people are well aware of the type of profile and Λ-in. sheet trailing edge extensions, spectacle which will draw appreciative public with the trailing edge fences to support them. Care support, and the Barcelona club in particular have should be taken that the two extensions on either fostered Combat and Team Racing to bring about side of the elevator are exactly in-line, for on them wide public interests in the hobby of aeromodelling will depend upon the stability of the model in flight. throughout their country. Do not forget to add the tip weight in the outer Naturally, Combat fits in very well with the wing, make up the tinplate tank, then fit sheet on Spanish temperament and there has been rapid the leading edge and centre section. progress in design, final result being ‘‘Duellist” . Fit tlie bcllcrank, hinge the elevator and connect First requirement was found that the model the two with a push rod, bent to accurate length should be faster than all others and secondly that it with elevator neutral when bcllcrank is neutral. should have good manoeuvrability. Flying wings Then fit the 18 s.w.g. lead-out wires running were found to be faster, particularly when built through the brass tubes on the inboard tip. lightly, but they suffered from a large turning radius Note that the push rod is not soldered permanent­ and were not quite as good as the conventional ly in position on the elevator. This is a good idea, model in tight manoeuvres. That was before the for it allows for quick repairs and disconnection on compensated elevator was introduced—a new idea the field. This also permits the celluloid grommet which occurred similtaneously both in Switzerland to be slipped over at the covering stage to allow a and Spain, and was seen on models from both of hole in the covering for push rod travel. these countries at the Critcrium of Europe. This is The engine mount or “fuselage” is simply hacked simply projected area of the elevator, forward of the out of n piece of scrap hardwood from an eggbox or hinge line and which opens on to the” opposite” fruit box and being in one piece, is immensely side of the fixed wing or tailplane, forming a slot. tough and will withstand a head-on crash in the It gives a snappy action which calls for care during hardest ground. Carve away a space to accommodate the initial fiights, but when one is fully trained to its the engine crankcase then secure the fuselage to the rapid effect, it is possible to execute tight manoeuvres leading edge with cement and use an 8 B.A. bolt and brings the Hying wing up to the standard of to locate the extreme rear end. manoeuvrability required for Combat. A Byra 2-5 c.c. diesel, powered the prototype and As will be seen from the drawing opposite, there airspeed is in the region of 65 m.p.h. with a 8 | in. is really very little to the construction, as the design x 5in. propeller. We recommend an 8 x 4 or 5 on is no more than a conventional stunt model wing to any of the British 2-5 c.c. diesels for utmost per­ which is added broad sheet trailing edge exten­ formance. sions, elevators and a hardwood engine mount. Cover with silk if possible, otherwise a double cov­ Make up the wing first by assembling all ribs over ering of heavy tissue and plenty of dope. Finally, as the lower ft-sq. spruce spar, pinned down in place our good correspondent in Barcelona says, “attack on the plan. Add the leading edge, basic trailing always, good luck, good sight, and go to the toro!” 152 March, 1957

initial rate enabling it to get upstairs at nearly 2,000 ft. per minute. The wings, which were fully cantilever, were built on a single spar which was actually two box-spars, joined together top and bottom with three-ply, to form a single unit of constant cross-section throughout its length. Ribs were of three-ply with large circular lightening

AIRCRAFT DESCRIBED No. 83 — by P. L. GRAY r u m Dr. i. holes; the leading edge was sheeted, and the trailing edge simply n wire which formed a scalloped profile when the fabric was doped. Ailerons were of welded steel tube and there was some variation as to the taper commencing from the first or second (inboard) rib. A pril 21st, 1918, saw the end of the career of the Fuselage and tail assembly were of welded steel tube legendary Baron Manfred von Richthofen when, in his construction and very similar to the Fokker DVIII Bcarlct Fokker triplane 2009/17, he crashed into the described in the November, 1956, issue. Centre-section British lines fatally injured by the guns of Roy Brown’s and undercarriage struts were of streamlined steel tube; red-nosed “Camel". Richthofen had first flown the the interplane “struts” were simply wooden ties no Dr. 1. in September, 1917, and on the 2nd he shot down more than half-an-inch thick. an R.E. 8 for his 60th victory in a machine serialled A near circular metal cowling housed the llO h.p. FI 102/17. Other triplanes he flew at various times were Oberursel engine, the front face being fretted with numbered 114 17 (which he crashed on October 30th), round cooling holes—some Dr. 1’s had open front 152/17 and 425 17; it was in the latter that he scored cowls similar to those fitted to French Nicuport scouts. his final victory—the 80th—the day before his death. The cockpit was austere: a bucket type seat was A more spectacular exponent of the triplane was mounted on an adjustable frame and covered with Werner Voss, who downed some 48 Allied t-:rcrafi during leather-cloth; flying controls consisted of a tubular his fighting career. The story of his death is an control column mounted on a rocking shaft, and of epic in WAV. I literature; when alone on September a tubular rudder bar, with simple stirrups. A double- 23rd, 1917, he ran across a flight of six S.E. 5’s from handled grip was at the top of the control column, the 56 Squadron led by the famous Capt. “Jimmy” left side of which was pivoted and used as an auxiliary McCudden, and managed to shoot holes into all of throttle control; between the grips were the triggers them before falling to the guns of Lieut. Rhys Davids, for the guns and the engine cut-out switch. A unique a young Welshman still in his teens. Another colourful feature of the guns was that they could be fired triplane pilot was Heinrich Gontermann. whose independently or simultaneously. speciality was balloon busting; he died on October 31st, Some Dr. I’s were Fitted with 110 h.p. Le Rhone 1917, when a Dr. 1 in which he was on a test flight broke engines which have often been referred to as captured; up. Reports seem to indicate that no more than about 150 in view of this the following note from the well-known of the type had been built when production terminated. authority, Mr. A. R. Weyl, should be of interest: When designing this machine Anthony Fokker’s aim “These rotaries were Swedish-built Thulin engines was to produce an aircraft expressly for “dog-fighting” which had been manufactured to the order for the and so manoeuvrable that it couldn’t be hit. That he German Government under licence from the French succeeded cannot be denied; another attribute of the Le Rhone firm. At one time there were 700 of them at Dr. I was its phenomenal—for the period—climb, its Adlershof, brand new and complete with all spares.” Heading: Adolph Hitter von Tutschek in Dr. /. Thin *hnw* the atreaky camonjlag· lining vertically on fuaelage ami rhordwiae aero*» ir in g *—«1 nd the location o f Her in I num ber. Vale blue underaurface m ay be il extending along Imtlnm edge of fuselage tide. lielote (left): Vrolotype Dr. I irith unbalanced aileron* and elevator* untl clear iluptul covering. (Might): Excellent "action” *hoi u reputed to be II erner Von*' aircraft. Da* a “face” painted on cowling and coloured »tripe each nideof fuaelage insignia;

IS4 March, 1957

Know Your Engine PART TEN

IIIIIIIIIIIIMIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIimilllllllllllllllllllllllll

With tub elementary form of carburettor used on the ratios of the “under piston" volume with the piston all model aero-engines (/>., a jet hole opening, normally at top dead centre and bottom dead centre. If the dis­ controlled by a needle valve) anything other than suction placement of the engine is X c.c. and the actual crankcase feed will result in a continual flow of liquid fuel when the volume at B.D.C. is Y c.c., then this ratio is X-fY/Y. engine is stationary, unless the needle valve is closed The higher this ratio the more work has to be done on right down. It is therefore more or less standard practice the piston travelling down to the B.D.C. position. Hence to arrange the tanks so that the standing fuel level is not to minimise power losses a designer may deliberately use a low crankcase compression ratio, which may result in fiA/S£ TANK TO HU UN£ the engine having very poor choking characteristics. It should be appreciated that for a given speed the volume of mixture inducted is unaffected, but factors giving a rapid suction effect, e.g., high crankcase compression ratio, small intake diameter, shorter induction timing, etc., give more pronounced suction and taster starting characteristics. The method of induction also affects the issue, side-port engines generally having good suction and thus are far less susceptible to suction head. Most side-port engines will suck in and run satisfactorily with the tank well below the intake position. Most reed valve engines have similar characteristics, but rotary disc induction is at the opposite end of the scale, with rotary crankshaft induction intermediate. above the level of the spray bar jet hole. I'or static running this is generally quite satisfactory for the suction head resulting (i.e., the “head” or height through which the fuel has to be sucked to reach the jet hole) can be made quite small and there is little variation between this head with the tank full and empty—Fig. 1. The actual suction available to lift the fuel varies a lot with different engine designs, although all may operate perfectly satisfactorily when running. By this we mean that some engines do not readily suck up fuel front the tank to fill the fuel line for starting, even when fully choked and with a minimum suction head. For bench running, in fact, with a set-up like Fig. 1 the easiest way to fill the fuel line may be to lift the tank bodily and so momentarily apply gravity feed. To u large extent the “suction" power is governed by the crankcase compression ratio. This can be defined as The predominate pressure inside the crankcase of an engine is positive and suction pressure is realised only over a proportion of the cycle. Thus finger choking and turning the propeller over by hand to suck up fuel will apply both positive to blow-back and suction pressure to the fuel line. Particularly with racing engines or engines designed for high operating speeds the liming may be such that there is appreciable "blow-back" when turned over slowly. The correct technique for priming the fuel line in such cases is to move the propeller forwards and backwards across compression, applying finger choke only on the forward movement. In this way the intake is sealed only on the suction movement and blow-back can escape, through the intake on the return movement, the finger having been removed. This seems a small point but is one which gives trouble to many engine operators who are puzzled by the apparent lack of suction with a March, 1957 155 particular engine and perhaps have to resort to blowing Assuming that the engine intake is on a level with the through a fuel tank vent, holding a model up on its nose, top of the tank and the fuel pipe arranged suitably to etc., for priming the fuel line for starting. Provided there pick up from the tank from full to empty, conditions for is only a small suction head to start with, once the fuel starting and adjusting the engine on the ground are zero line is properly primed no further troubles should be suction lift. Now with the model flying and tank still experienced with it draining again, unless there is an air nearly full there is effectively a positive pressure feed due leak in the line connections. to centrifugal force, which becomes a negative feed force Once running the engine can tolerate a far greater after the tank is half empty. suction head without interrupting the fuel flow to the This effect can he calculated quite easily. Centrifugal engine, although there are obvious limits. In the case MV* of free flight power models, provided the tank is mounted force is equal to ----- , where M is the mass, V the speed on a level with the spray bar to start with, few troubles r should be experienced due to changing fuel level in flight. and r the turning radius. For a given weight W of fuel, It should be borne in mind, however, that to minimise WV* the effect of changing attitude on suction head the tank centrifugal force = ----- which for 136 m.p.h. (200 ft. per should also be fitted as close behind the engine as gr possible—see Fig. 2. Almost any form or shape of tank see.) and a 52.1 ft. radius circle is centrifugal force is usually suitable, provided the fuel feed remains sub­ 23-7 W. merged for the duration of power run required. For Thus in the case of the example sketched in Fig. 4, at the start of the run with the tank full conditions are equivalent to placing the tank some 23·7χί), inches above the spray bar (/>., equivalent to nearly 12 inches gravity feed on a 2 inch wide tank). At the end of the run, conditions are equivalent to suction feed of a somewhat reduced order (due to the smaller weight of fuel left). But even so the total change of head from tank full to tank empty is considerable, and the greater the speed and the smaller the radius of the circle, the greater the effect. Most tanks for speed models are, therefore, made tall and thin, a minimum practical width ensuring a mini­ mum change of fuel head during flight. At the same time the lateral position of the tank with respect to the intake is significant. If too far towards the inboard side of the model (i.e. large D, dimension) the motor may have a marked tendency to richen up, slowing the model down m x m i ______m x m i μ μ υ ϊ μ υ when the motor will lean out again, and the process may be repeated until the tank is half empty. Conversely, MODfi Af SPfM with the tank too near the outboard side of the model (large l) t dimension) the motor may tend to lean out too example, mounting a circular tank with the feed to one much, Fig. 5. Adjusting the lateral position of a speed side might result in the engine being starved in a steep ♦»«k is often a cure for such troubles. climb or when the model is accelerating (when inertia will throw the fuel to the back of the tank)—sec Fig. 3. (7*o be continued, tilth special data on preuure-fred tanks) Normally, however, on free flight models the fact that the engine will speed up due to the propeller becoming “unloaded” in forward flight will have more effect on needle valve setting than tank position. In the case of models subjected to considerable acceler­ ations—e.g., aerobatic radio control models and control Motor illustrated opposite is. line models—the question is far more important for Cnee him lot akian Stale producl, inertia effects arc exaggerated. On a control line model, the M. V.V.S.2S, fir»t seen at the World Championship», Paris. for example, fuel will tend to be piled up with a near- I9S5, featuring off-set needle vertical surface in the tank—Fig. 4. valve, slipstream directed indue- lion, expanding exhaust port and other potent raring drlails. The M. V.V.S, also employ» a unique fuel feed system as sketched at right. System is the Chicken Hopper principle, the lank Is virtually 2-in-l. Hath se c tio n λ of the tank are filled through detachable screw plug irith the model held on its side. Fuel filters through to the feed compartment ria a central pipe anti when in Jlight, this feed compartment is con­ tinually supplied from the in­ board. main section. Principal advantage of such a method is that there is a minimum of centrifugal force effect on the smaller feed section of the tank, yet the overall capacity is suffi­ cient for the required full kilo­ metre run far competition speed record ul tempts. 156 March, 1957

Above. Champion of Champion», K. Ellia o f I icloriu, launching hi» It'ebra 1.5 C Ία»» 1 powered winner with many hand» to a»»i»t in high wind». Next, the aecond placer, X. H a r d in g , with high tfl Max 15 model. At right. Ken Dr Htnttford prepare· hin /■//·' •rale Brintnl Bullfinch. Jlown a» monoplane and biplane, wa* an· placed;Hlill require * engine eylimlere. IOth Australian Nationals Below, al»n unplaced, nice I.ancaater by Tony Auden with four E.D J.tb’a. 'i’ll is y e a r ’s r e c o r d entry of 170 contestants, pro­ vided n most entertaining and keenly fought scries of events. Contestants came from most States including Tasmania; in fact, the Wakefield Trophy was won by Van Leuvan of Western Australia (proxy flown, entrant was 1,500 miles away). International flyers will recognise the names of competitors Bond Baker ohd Adrian Bryant, both recently in Britain, who made special efforts to be present for the competition. G. Bent land scored top honours in the Free Flight Scale section with a beautiful l.uscumbe Sky pal, which boasted not only of perfect workmanship but also perfect scale. This model flew fairly well, but was even surpassed by F. Taylor’s excellent flight with his Westland Widgeon, which finished second in the event. Control Line Scale saw a surprising number of multi- engine aircraft, all of excellent construction. Winner F. 'Baylor had an exact scale Halifax, and M. Newnham was runner-up with his Viscount, which was first place- getter the previous year. J. Bone recorded third place with an outstanding 90 in. span Douglas Invader powered by two Anderson Spitfires. Weighing fourteen pounds this job really pulled hard, and Jack’s heels could be seen slipping while he flew. The last two mentioned models were both covered with silverised wallpaper, the A26b being made up with scale panels. Class 1 Power Free Flight times and performances were seriously upset by the wind, however on following Ahorc Mercury Aeronca days the Class 11 and 111 events were held under more h it ·c ilh ra tlin c o n tr o l hv reasonable conditions. R. Bird put up outstanding per­ it. Kent tic o f Qucenaland, below: Clan. -A" T/lt formances to win the two classes with the same high winner. Junior Allen of thrustline model. He substituted his O.S. Max ·29 for Bentligo at work on B. a Max 35, and produced the same rocket climb using a I)ru*un'* racer single blade 11x4 propeller. Generally the wind upset most of the Free Flight events, the F.A.I. Sailplane, A/2 Sailplane, Wakefield, and F.A.I. Power all suffered. The times in these events should not be taken as an indication of the standard in Australia, as in some instances the boys refused to even unpack their models, and fly in the contest. Controline enthusiasts put up some rather startling results with the Japanese Max engines, collecting more first than any other makes. Perhaps the best example was the performance of a Max 29 in winning the two {continued on pate 159) DEBDONAIRS M.F.C. enjoyed consider­ able publicity when the local dry cleaners window was loaned for a prominent display of model* which has already increased membership. They also hit the front page of tltc local paper with a good photo and verse! This club is being put on the right lines, having already formed its constitution and rules, and has adopted Captain Scott's Antarctic motto, "Festina Lentr", literally means "make haste slowly”. S o i i II m i ii Λ rest To coincide with the S.M.A.E. Cup and Kcil Trophy event on March 31st. the area is running Open Power. Glider and Rubber Free Flight contests, plus A and B Team

PETKOL k a t i o n i n o hue already had Us I Ira,It up «I l.pnom on the ocemtlon o f the filed on the forthcoming programme, for as H ill II hilt· Trophy. They are watching the you will sec by the S.M.A.E. announce­ rnpiil atcent an,I ditappeuranee o f a new*· ment» (centre col.). Area Centralised mcct- paper *hrri in the 20 knot wind! him of itil's have been revised to reduce the amount winil effect ran he *een in dieattrou· of travelling. Talking of contest programmes, rollapte of Dnnran Worn!*' (I.ulon) 2nd I must point out that the date, August 4th, H ah,· entry at riμht. Dozen· of modelt given last month for the South Midland /inithetl Ihit way. Holly was quite wrong, this date being sleeving process to reduce them to 1.5 c.c. reserved for the Northern Gala, whilst the NOR'IHERN HEIGHTS M.F.C. have South Midland Hally is on August 25th, the announced the date for their rally as June original date for the Northern Gala. 23rd at the Ilalton venue. The Queens Cun Hally organisers would he well advised to event for 1057 being for models to the F.A.I. plan their dates at the very earliest oppor­ power specification, other event* as before. tunity if they intend to get full club support. It is hoped that the petrol rationing will not I learn that coach bookings arc hkclv to be restrict the attendance at this popular Gala, difficult unless very early reservations are hut I know that a lot of people will be saving made and there is no reason whatsoever why up their gallons in older to be at I lalton lor some of the big rallies could not he an­ that inevitable glorious day. nounced right now to ensure club bookings. The Regional Gas Hoard Publicity This business of prior announcement of Department put on a free film show for the Hallies ami open events could make or mar ENFIELD AND D.M.A.C., who tell me m eetings. 1 fed that although weather that they offer this service free gratis pro­ • onditions were appalling at Epsom for the vided they show one him ol their own for Hill W hite and Winter Glider Contest, there advertising purposes, hut this is usually one would have been more than double the of the best films anyway. The Club took part support had the date been announced early in the local Youth Festival and put on a enough tn these column*. display including a novel "model making” machine made of i-in. square and wallpaper IiO n d o n and was suspended in front of a black back­ BLACK HEATH M.F.C. organised the ground. Materials were fed into one end and Hill White and W inter Glider event this year m odels flew o u t o f th e o th e r ί 1957 C on tro h n c Racing. Radio Control and Chuck Glider on ominous January 13th. with 58 entries Rally is provisionally dated for July 7th, events. No venue is announced, hut I hope attracted to this desolate spot where the w ind including Team Racing, Combat, Handi­ to have this in time for next month. was blasting at the merry rate of 20 knots. capped Speed and maybe stunt. DORKING AND DISTRICT M.A.C. One glimpse that I had at the results sheet would welcome new members, details can be showed that about one thin! of the entry Important ( outfit obtained from F. Tuck, II Parkway, managed to make cn : flight and victory went Dorking. They have awarded a seal of merit to those in the Hill White who could put up t'h a n g ^ N to the local Model Aircraft Shop for their a reserve model for a second flight. In view of the present system of petrol great help to members and believe that this All credit is due to those stalwarts who rationing, and consequent restrictions upon is the first time any such award has been braved the we thcr. travel, the S.M.A.E Council have decided made by a club in this country. The Bill White Cup upon the following changes in the 1957 1st· J. O'Donnell, Whitcficld. 6 m in s.; Program m e. Koutli Mitlhiml 2nd· D. Latter, Men of Kent. 4 ruin*. 42 Area Semi-Centralised Contests OXFORD METEOR M.C. have a few secs The Area Scmi-Con;ralised meeting own design models on the hoard, but there Win»cr Glider Contest arranged for April 28th, is cancelled, and the is a decided tendency to use A P S. designs 1st: P. \inor, CM .. 2 mins. .11 secs.; programme amended as follow*: by most mcnilxrrs. One original model due 2nd: M. Sa\a;c, Dc Havilland. 2 mins. 28 March 31st: to come out soon is a low wing free flight sees. S.M.A.E. Cup A t 2 Eliminator model with an Amco l’.H. 3-5. It is hoped to run the event early in Keil Trophy Team Power March next year in order to obtain a larger M ay 19th: South I’liiM mi entry and better weather. Have they never Astral Trophy F Λ.Ϊ. Power heard of mad March winds! February is the Guttcridge Trophy Wakefield. Final results of the club championship in month for calm weather 1 think. De-Ccntniliscd Events BRIGHTON D.M.A.C. show* l ied Boxali Another London area organised winter March 17th: to be the winner, his brother Keg the runner- meeting was the WANSTEAD AERO- Gamage Cup U/R Rubber up and Peter Drown 3rd; 1957 sees the club MODELLING CLUB Imitation Hally on April 28th: celebrating Us Silver Jubilee anil in February VVjuwt» ad M ats w here S id cu p , W est Essex Weston Cup l /R Rubber. plans will be formulated tn commemorate . nd Southgate took part, with the host club. Lady Shelley Cup Open Tailless. this event. Ί he Class Λ Final was especially thrilling, International and F.A.I. Events Along the coast. SOUTHERN CROSS no less than five models taking part, three Areas will l>c required to liold one other A.C. elected John West their sportsman of finished, but none were broken, only |9 secs, Λ/2 eliminator during March, April, or the year, and a glance Jt the trophy awards separated 1st from 3rd. Mike and John May. The two F.A.I. events on May 19th list lor 1956 shows that he won 50 per cent, Templeman tied for 1st place in Combat will only be three flight (four minute of the cups, including the Miles Trophy for whilst in Open Stunt, l)avc Platt of Wan- maximum) events. Club Championships. 1 like their announce­ stead w on w ith hi* ow n A .M .10 pow ered De-Centralised Contests ment for the Annual Dinner for January M a rt in soon to be a kit model. The fust JA Pie entry for these is still required, at 26th: " ... The Bar will be open at 6.30 Team Race held in this country to the least seven day* before the event. “Late and eating commences at 7.00 p.m. Anyone proposed S.M.A.E. National Rules was won entries'' will be accepted after this date, but arriving after that will find both his soup try \likc Bassett's Oliver Tiger Cub model at double fee*. and hi* w elcom e cold. . ." ! with winning speed of approaching 80 E n try F e e s m.p.h.! Looks us though JA is going to he Note there is no reduction in fee for A iiiflin ii exciting and a lot of Oliver Tigers will he Junior entries in Power Contests. Entry fee I see by the Area newsletter of January sent down to the manufacturers for their for th is class is Is. 6d. to all full members. that people who arc having difficulty with fiw m n r a 158 March, 1957

For I mir liiary could be covered by Microfilm or tissue, and distinct from the F.A.I. restrictive types. which we are sure will lie very popular "Hot" engines have been appealing from ANNOUNCED RALLY DATES among indoor fliers. Their film shows must the Eiflhtender stable, and I expect to see M a rc h 31 st be popular, as they have to run on a ticket uite a number of these units in action S o u th e rn A rea Rally O p e n 171·, T /R — entry basis, and I also note that this year iv Suring the coming season. venue to he announced. the 2Lt in the club's history. On February .Much the same point of view tomes from April I3th l Uh 27th, Gcolf Dunsmorc will give a talk \vi h WIGAN A.C. concerning F.A.I. model·.. Indoor Rally — Corn Exchange, Fpidoscopo illustrations on the club'·» For they are building open desiguu and nLo Manchester. history, and the ncwshcct invites sugges­ have interest in controline speed. A couch J u n e 23rd tions on the appropriate way of celebrating club i> being formed to make dungs easier Nortltcm Height* Gala Ml Classes— the anniversary during tlie coining year. on the pocket for the intended trip down R.A.I . Ilulton. to the Nationals at Waterbeach and u film J u ly 7th show is being planned to encourage new Enfield Controline Rally—T/R. Combat members into the club which now has and Speed. Following the dissolution of the West Align .t 23th Hartlepool D.M.A.C. there have been many twenty-six on its book*. people who have been seeking u local club HYDE M.A.C. announces -i Radio South Midland Rally—All Classes— Control Rally on April 7th, the Rail» to be Cran field. to go to. and eight of them with access to Three large free-Jlight field» on a school held on their new and larger field which is playing field for controline are intending to lust outside i lyde. This is a pre-entry event, transport to any events are asked to contact form tlie WINGATE D.M.A.C. People in fees 3*. per model with cash prize* tapering the Secretary. N. Willis, or I'.RO ., M. A. the vicinity are advised to contact G. dow n Iron» /J3 3*. lor first place. T h e King, as early os possihle. I hope the Trudgill, Wayside, Durham Road. Wingate, contest permit* more than one model per applicants lor coup«>ns have some success. Co. Durham, for detail· of membership. person and each flight must lost longer than Ί lie Winter Contest hold on January 6th Tlie SOUTH SHIELDS A/M's had the ? minutes and no more than IS minuted. (their first event of the year» attracted beet year and suffered the temporary loss of Entries tu J aim·.·» 1-cigh, 21 llurdm g Street, members of Thames ide, Anglia, Cambridge an \.P d i. \ umber Fight (Rider which flew H yde. and Laindon despite the very cold blustery o.o.s. on tin; usual test flight from Town S c o tla n d conditions. First all-in result in power/ M oor. In his fir.*t trv at C o m b at. " N u tty " rubber/ghder contest arc as follows: - Almond came 2nd to G. Oswcll. of TY.NE- ANGUS D.A.L. held its A.G.M. in 1. M . A. K ing .. Pow er 8 : 56 MOUTH M.A.C. (sec "Model New," MON TROSE M.A.C. clubhouse on Decem­ 2. G . R ead ...... Pow er 7 : 48 January issue) and most remarkable of the ber 16th. New league Comp. Secretary is 3. G. French...... G lider 7 : 00 recent flights was W. Metcalfe's out of sight Roy Yule of HI CKSBCRN Λ.Τ. Six 4 Miss G. Cox ... G lider 6 : 06 flight at 2 : 47 with the A.P.S. Creep from competition* fixture* were planned. Venue 5. N. W illis .. G lid e r 6 : 51 only a 3 second engine run needless to say of first i* M ontrose Aerodrome on April 2ifth 0 R. Grey goose G lider 4 : 38 with considerable thermal assistance. for O pen R u b b e r and a o n e -h o u r scram ble WITHAM D.M.A.C. have been holding lus Λ/2 Glider Between April and regular meeting» at the W. 1.1 (all. Rivcnliall, \orth VI «‘stern Scptemht-f, mix Λ/2 competitions will be every fir·! Saturday in the month at 7 Indoor National Meeting at the Corn held in conjunction with the other event» o’clock, and hold lour contests during last Exchange, Manchester, is planned for fhii run by the League in 1957. summer. T. C. Rogers wav champion of the winter bv the area and luu been referred to There is a club .it TARVES in Aberdeen­ year for outdoor frec-Hight, and right now the S.M.A.E. for approval arid backing. shire with an enthusiastic niemliership of they are settling down to indoor living, The actual date will be during April, but twelve, and the current craze is flying whore chuck gliders. Jetex and rubber as they say. why not start that indoor controline by moonlight! New club record R.T.P. are very popular. They claim 54 . 45 model now? (see Hangar Doors). ho* been set up by G. Donald's Frog 149 in.p.h. from a Jetex 50 on <>-M. wires. New Last Rally of 1956 from the COLNE pow ered F ox of 8 min*. 35 sees. o.o.s. members arc welcome at any rime and can D.M.A.C. was held on December 16th. U a l t s be ensured of a good evening. 2 j-minute maximum» were flight and as the \i NORWICH the M.A.C. held their following results show. J. O'Donnell main­ From C. Green of 115 Deva Way. A.G.A. and R. Howard-Al|>e proved himself tained his usual invincible reputation. The (Jueen* 1'ark, Wrexham. N. Wale*. I have the controline champion by winning Speed, rally was flown through very wintry condi­ an appeal for old copies of Ann>m o i>ki.i .h < Combat und Class A Team Racing at earlier tions. with rain. wind, snow and finally, near and similar magazine* to be sent to him for meetings. Three of the lads have started flat calm with very bad visibility. Radio distribution in the local T.ll Sanatorium planning for controline duration flights of Control attracted flic entries. and Orthopaedic Hospital Mr. < irecti spent about four liours with no external fuel R u b b e r some time himxelf in tlie local liospitul with connections. Sounds a good ileal more 1. J . O 'D o n n ell .. W hitefleld 6 : 30 a cru*hed hand, appreciates how time can sensible than those 34 hours auxiliary fed 2. If. O'J >onnell W hitcficid 5 : 44 hang heavy When you are out of action, and American marathons. 3. D. Barber ... Southport 3 : 30 feel* that rite lads will certainly appreciate W e s te r n S a ilp la n e anything that can be sent along. 1. J . O 'D o n n ell ... Whitcficid 6 : 57 ■V n I' i i K Multi-engined controline models arc 2. Francis ... ( hcadle 5 : 50 popular with the BRISTOL ACES where 3. Helliwdl S ha rsto n 5 : 05 Japanese 19-year-old modeller, particu­ Secretary Pete Diimage's beautiful scale larly imerestrd m F.A.I. classes. Contact: Ambassador anil B.E.A. Flagship colours a 1. R iley ...... Accrington 6 : 32 Y. Kirnuni. 102 Ishiysm-cha, Otaru, spark of interest for 2<»-in sp a n Slauiuilo, 2. E. L ord ... Accrington 5 : 23 Hokkaido. Japan. a Cetsna 311». a D akota and it is said that 3. B. Eggleston ... Whitefleld 5 : 20 Canadian Pen Pal wanted for M Michlc, there arc more to come. On the free-tlight C o m b a t 7 St Rule Place. Auchmuty, Glenrothes, side, un.A/1 contest i» visualised using the 1 . L Carlcy ... Whitcficid Fife, Scotland. A P S. Aiglet as a standard model. 2. R Place...... Wharfdale Australian. Tasmanian, or New Zealand WHITEFIELD anκ well in evidence in the Pen Pal wanted for keen 22-ye.vr-old flier, above results, and also announce that they C*. McNulty, 24 Tuckett Rd.. Wqodhousc LONG EATON D.M.A.C. have elected enjoyed a Christmas Party nt the local social Eaves, Loughborough, Leicestershire. a formidable number of fourteen officials, club, where girl friends were invited. This For Japanese Speed Champion, T. Fuji!, including a catering manager, which is quite was the first party of its kind to be held by c/o Tutunu, 3-78/ Tiiluidn-Miniimi. Tosfii- a new one on me. The club has organised an the club for some time, and the programme miku, Tokyo, Japan, n British controline R.T.I’ League which is now in full swing was a mixture of film* shows, games catin’ Pen Pal wanted. with a top speed of uhout ‘75 ni.p.h., pre­ und drinkin'. I have no doubt that a fine A special plea by B. Cant, 108 Graham sumably by Jetex. The club has hopes of time was had l>y all. and there is a general Road, Southampton, for pre-war plan* for its own workroom and headquarters in the agreement that this should he made an Cahills. Korda*, and Flying Minutes near future. annual event. Wakefield», plu* Nippy" the Normac kit. The BIRMINGHAM M.A.C. finished The A/l Glider specification has been N E W CLU B S the old year with u flourish, Reg 1-onnox eclec.eJ by the CHEADLE D.M.A.S. for L A P W O R T II & D I S T R I C T M I C. winning the Might Cup and Ray Monks construction courses followed by the free- 1 W. Miller, 2449 Stratford Road, only just managing to get his S.M.A.E. tlight contests. They are also having u series dock lev Heath Solihull, Warwickshire. dinner ticket hv winning the Frog Senior. of discussions on the various types of model PECKHAM M.A.C. The Midland Area Team Cup was won by on club nights during winter evening*. A. E. Fisher, 26 Strickland Court, tin.· c lu b ut W allsbourne M ount ford. WALLASEY M.A.C. have been struggling London. S.E.I5. Indoors, two more records have fallen to manfully to run all the pumps over the past m e m b ers o f th e club, th o se o f tin* C lass A” months between gales, and John Minnay SECRETARIAL CHANGES R.T.I*. and Ornithopter. is the winner of rubber and Stan Hinds ABINGDON AND DISTRICT M FC. Congratulations to the LEICESTER Glider Cup Had light stopped play in the V J Howe. 16 Mathew» Way. M.A.C. in presenting a full size plan for power event, visibility ar 3 p in. down to Lamborougli Hill, Nr. Abingdon. Berks. indoor lightweight on the buck of their 30 yds.! Am a ic-mlt of the recent Ε.Λ.Ι. ASHTON M VC January newsheot. 'Hits was called "Ju n io r announcement, most members are now W. 11 ad field, '» land Street. Juggernaut", q u ite a sm a rt little m odel w hich building "open" models in nil classes as Sulybridgv, Cheshire. March. 1957 159

IOth Australian Nationals (continued from page 156) were the smaller and fuster Team Racers in all Classes —very large stunt models all powered with .■> or 6 c.c. Class 11 Team Race Events and in the second breaking motors - very small and overpowered combat machines the Australian Record. This plane of I). Whitely, flown —many multi-engined scale jobs, practically ruling out by stunt star A. Bellamy, recorded 8 mins. 42 secs., and the enthusiast with a perfectly finished single motored consistently clocked 90 plus in.p.h. for 40 plus laps aircraft—the usual takc-οΐΓ troubles with speed jobs during a whole day's Team Racing. Oliver’s dominated the necessity for penetration with a radio controlled Class I Team Race, and it seemed to be just a question model and spectacular climb of the high thrustline of who hud the best props and fuel to decide the winner Free Flightcrs—Tony Farnan - U. Dcason. J. Crockett, funner Victorian Junior Stunt FREE FLIGHT Champion, gained top honours in the Stunt event flying C last l R Ellis (Victoria) 6 : 32 Ratio his “Draggin Waggon", powered with a Fox 35. cion n It. Bird (Victoria) 21 : 33 Ratio C la n I I I ... It. Bird (Victoria) 20 : 0 Ratio An enormous entry in the Combat saw once again a RJC ontrol ... 13. Robinson (Victoria) large number of O.S-’s, and the winner, R. Ellis, had a F.A.l. (Hiiltr ...... It. Hammond (N.S.W.) X35 sec particularly fast job powered by a Max 29. Flying wings J cte x ...... (’. Stones (Victoria) 213 see*. were |x>pular, although a Team Racer flown by R. Silva Chuck (Slider ... (’. Stone* (Victoria) 237 sec*. managed to reach the final. Seale ...... G. I'cntland (Victoria) 614 pi*. Australian Class III Speed Record was broken by CONTI tO L L IN E L. Buck, in a spectacular fashion, when he recorded Team Race I ... 13. Dcason (Victoria) Team Race I I ... i). Whitely (Victoria) 0 : 31 149 m.p.h. with a McCoy 60 powered model employing Team Race III I. VV. Shurmcr (N SAW) Monoline. This was approx. 11 m.p.h. better than the '' Advertiser'’ Trophy ... D. Whitely (Victoria) s : 32 previous record, arid Lcn went on to win the (Mass I and Speed I ...... L. Buck (South Aunt.) 96 m.p.h. Speed 11 ...... L Kinncnm (N.S.W.) 136 m.p.h. come second in Class II with 120 m.p.h. Speed I I I ...... L. Buck (South Aunt.) 109 m.p.h. Radio Control saw only rudder control operation and C om hat (Butchers Picnic) It H yde several of the star entrants had troubles or crashes before S tu n t D. Crocket! (Vic.oria) 342 pts. Junior Stunt I. W right (V ictoria) the event, thus making the field fairly small. Scale ...... 1·'. Taylor (Victoria) The potential for radio Hying in Australia is quite strong, and this year should see rapid developments of INTERNATIONAL TEAMS A 12 F.A.l. POWER vastly increased numbers entering the ranks of the 1st B. Ilovvic (South Aunt. 507 1st R. Halstead (Victoria) 540 con t rol Ied F ree- Flighte rs. 2nd R. Hammond (N.SAV.) 4X8 2nd J. Fullerton (Victoria) 433 This year’s Champion of Champions was R. I'.llis of 3rd D . Jacobs (T asm ania) .. 487 3rd K. Hlli·. (Victoria) 42S Victoria, who proved himself an all-rounder by placing 4th M. Huckmuster (Viet.)... 454 4th 13. Healy (N.SAV.) . 364 in four Free Flight events, and topped this off by WAKEFIELD winning the Combat. His Fox 29R speed job would have 1st Van Lcuvan (West Aust.) ...647 made some impression had the fuel supply been stable. 2nd M . H ayaom (Victoria) ...... 586 3 rd Tl. B aker (Q ueensland) ... 540 Lasting impressions gained from this year’s Nats 4(h It. Bird (Victoria) ... >20

* Bxclbuivo/cf tM bd fo r the.

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SMITHS CLOCKS & WATCHES LTD.. SECTRIC HOUSE. LONDON, N.W 2 A Division o f S. Smith & Som (England) Ltd. 160 March, 1957

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MORE MONEY THAT’S ALL YOUR OWN OVER 70 CAREERS OPEN TO YOU IN: In the R.A.F., a single man gets FRHF. accommodation, AIRCRAFT, RADIO, ARMAMENT. ELECTRICAL food, heating, lighting, clothing allowance, sport and education. Λ married man pays low rentals and receives AND INSTRUMENT ENGINEERING · GENERAL marriage allowance. So you haven’t the cost-of-living ENGINEERING · MARINE CRAFT · AIR TRAFFIC worries of civilian life yet the new R.A.F. pay rates com­ CONTROL · RADAR OPERATING · PHOTO­ pare favourably with earnings elsewhere. GRAPHY · MEDICAL · DENTAL · SECRETARIAL SKILLED TRAINING ON FULL PAY CATERING · POLICE · MUSIC· R.A.F. RfcGT. ETC. You don’t need to be skilled to start: the R.A.F. will train you from the day you join. R.A.I . training has to be good: How you could get ahead in the R.A.F. you'll be responsible for the performance and safety of the At 21: Junior Technician world’s most modern aircraft. earning £7.17.6 a week all found Sport, comradeship, the chance to travel, 30 days' leave each year on full pay, regular promotion for the efficient At 24: Corporal Technician man. the opportunity of secure employment to 55 with (married) earning £13.4.10 a week pension and generous leaving grant what more could you At 33: Chief Technician ask of a career? The R.A.F. offers you all this find out earning £17.8.10 a week about--- it ·■by k posting'·'···"© '·■* the coupon ..v.. now! . _ -p* rasM Your route to success — the R ’A ’F

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Date of Birth March, 1957 161 LOOK FOR THE SIGN

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chance! MOTH Rubber Powered Γ , I I 18 in span J I I to obtain a copy ★ Pre-shaped Undercarriage i t All Balsa C onstruction of the 1956-57 i t Plastic Propeller i f All Parts O iecut i f Colour Printed i f Illustrated, Step-by-Step Instruction Quickbuild kits need no cutting out, no doping and no covering, they just fit together from the accurate diecut parts, which are ► merely pushed out from the specially selected medium soft Balsa. ► The Insignia, markings, etc., are all attractively painted Pictorial ► step by step instructions, ensure chat you can't go wrong when ► AEROMODELLER ANNUAL building. AUSTER AUTOCAR CESSNA BIRD-DOG Very few copies of this invaluable reference work are loft, and we urge Rubber Powered C /1 I Rubber Powered C / I I all readers who have not yet obtained their copy to do so immediately. 19 in Wing Span * * 19 in Wing Span 1 1 It contains the cream of aoromodelling material for the year 1956 and Post and Pkg. lOd. t a leaflet of content* is available on receipt of a stamped and addressed ------132-Page M O D E L B O O K ------envelope. 160 pages site 82 x 52 fully bound in plastic cloth with over 100 plans, drawings and illustrations. Price 10,'-. Acclaimed to be 1957’$ Most Complete A Reference Book on Aircraft. Trams, Boats. A - ____ § O r diract from the publishers 10/9 Cars. etc. It also gives full particulars and Prices of all models and accessories available ► MODEL AERONAUTICAL PRESS LTD. at Gamages. Also packed with interesting for articles, facts, figures, photos., etc.Post 4d. 1 / - t 38. CLARENDON ROAD, WATFORD, HERTS. only l H O L , 8484 ►ΑΑΑΑΑΑΑΑΑΑΛΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑΑ GAMAGES. HOLBORN, LONDON. E C, I 162 March, 1957

. . for easier filing, planing, cutting and glueing DUAL PURPOSE CLANS* a VICE SET Trust Trix to think of such a handy addition to your equipment. Four different sized clamps for modelling and handicrafts which, when used in pairs, form two adjustable vices that have scores of uses where the usual type of vice would be too clumsy. X-acto Clamps are made of special aluminiumalloy.witha tensile strength of 18 tons p.s.i.. and only a third of the weight of steel. With Cadmium-plated steel screws and swivelling lock plates. Set of 4 different sizes ... 10/6 e T R IX LTD . II Old Burlington Street, London, W .I Γ ΐ

ARTHUR MULLETT'S STOCKS AS UP-TO-DATE AS THIS MONTH’S “AEROMODELLER” and as near as your nearest pillar-box R.M. TRANSISTORISED R C FROG PLASTICS Single Channel Receiver S e a H a w k P. Tax 104/- · 22/6 Hawker Hunter ... 4 6 · 9d. Sabre F86E 4 6 9d. TRIANG RADIO CONTROL A.M. KIT SELECTION W estland S.S5 Heli. ... 4 9 I/- Crystal Cont. Trans. . £6/10,0 C anbcrra P.R.7 ... 7 2 1/4 Receiver ...... £4 0 0 E.D. RADIO CONTROL • VERON P. Tax Javrim 6 3 1/3Radio Slave ... £6 2/0 DEACON 52' F/F... 28 9+ 5 9 M eteor 8 5 - - IDouble Id. Pole Relay . . £15,0 Complete Outfit* P Tax Cardinal ...... 25/-+ 5/- Venom F.B.4 4 6 9 J. Boomerang £9 16 0 426 Cirrosonic “A.I” ... 8'- + 1/7 COMET SERIES Approx. I 96 Mk. II M iniature £14 β 0 62 4 Sabre F86E ducted ... 25 5 - Super Sabre: Starfirc: Thunder- THIS IS A.M. SERVICE Mk. IV M iniature £16 16 8 72 11 Sea Fury 23 6 4 8 streak: Sky Ray: Sky Knighc: * NO PURCHASE TAX ON Mk. IV Senior., £19 16 0 85 9 Mmibuster ...... IS/—h 3/- Cougar each 2 1 5d. OVERSEAS ORDERS. Everett ... £24 0 0 +-103/11 Spitfiro ...... 27/6 -r 5/6 8 R IS T O L B R IT A N N IA 100. i f All orders over 40s. from abroad R eceiver* Combatccr ... 23/6 - 4'8 B.O.A.C. I7J wing spa". Scale acknowledged by Air Mail, Mk. II ... £9,0 0 · 39,'- Also "Quickies", "Truflitcs", etc. I 96 14 7 2/11 i f Orders despatched within 24 hour*. Boom orang ... £5 6 0 2 2 /II DOUGLAS DC.7c, 16 span. • K.K. •Jr Goods properly packed and insured, Mk. IV M im aturo £13,0,0 52 The entire range including: Scale l 96 14 7 2/11 Everest £14 12 0 1- 63/3 Slicker Mite ...... 9/7 | IJ7 Complete with cement and stands. it C.O.D. to countries where Postal Junior 60 ...... 45/—r9/- ...... J Regulations permit, i t SPECIAL ATTENTION PAID TO Bandit 44 ...... 18,4 3/8 ; FROG AEROBAT H.M. SERVICES. WRITE FOR EMUXICK Stunt Queen C/L 21/3-4/3 • Newest Frog C L 38-in. model 5 DETAILS. P. Tax Joker i/A ...... 9/6 l/ll • for Frog 2.49 B.B. 2 0 /2 + 3 /1 0 · FROG 0.79 c.c. 37/6· 7/6 Star Scamew...... 7-6 !- 1/6 it Local currency accepted, full D C . R A P IE R 65, 14 II Ladybird ...... 18, 4 · 3/8 •WHILE STOCKS LAST! Official rates o f exchange given, • Famous Frog Prince 60·ιη.! D. C. MANXMAN 65/ 14 8 Southerner Mite . 10,7 r 2/2 • Sailplane 15·.15/· IPP(P.P. 1/6)2 i t Air Parcels to all parts at cost. ETA 29 Mk. IV £6 2 0 24,4 Pirate ...... 12/-+ 2/3 Frog 2.49 B.B. 66'J 13/- i t P e r s o n a l S e rv ic e o n a ll o rd e r* • CONTEST however large or small from Frog 1.49 Vibramatic 45 9 · 9/- Calypso 50 in. F/F ... 16 4 3/2 T GER PROPS home or overacas. A llb o n S a b re 44 1 - 9/11 Inchworm ...... 16.4(3/2 Specially for Como flyers.— THE Allbon Super Merlin 44/1 t 9/11 Crern 13/3+2/6 WORLD'S BEST— AS USED BY I9S6 Allbon D art Mk. II 54/- · 12/2 Cranwell Rubber ... 6 4 · 1/2 Championship Winners at Cron fie Id. Mills 0.75 c.c. w ith c/o 55/- - 1 I/- Dab Sailplane ... 8 3 1/8 8 x 3 j : 8 x 4 : 9 x 3 e a c h 2 8i E. D, Bco I c.c. 46 6 · 10/1 Empress 79 in. A.2 ... 24 9 4/9 Allbon Spitfire I c.c. 54/- 4-12/2 D.T. Dethermalising Fuse. 3 yds 9d. A llb o n S p itf ir e M k .il 43 9 8/10 Mills 1.3 c.c. 7 5 / 1 4 / 5 E.D. H ornet 1.46 c.c. 48 - 10/4 ARIHLR MLIIEII Elfin 1.49 c.c. B.B. ... 6 3 /4 -1 4 /3 Afyjlogies for not being able to supply these motors. We hope to be able to E.D. 2.46 c.c. Racer .. 66 6 -14/5 resume deliveries some time in 16 MEETING HOUSE LANE E D. Mk. IV 3.46 c.c. 66 6 14/5 ALLEN-MERCURY ENGINES March. BRIGHTON-«USIiX-ENG i m m March, 1957 163 c iia s a L u m

T i n : j i o i m x 147 DERBY STREET ItOIW I» M OTT S P K d A L I N T BOLTON, LANCS. ★ * ★ TO ORDER ★ * * ★ CONTROL LINE KITS * ir POPULAR ACCESSORIES i r RADIO EQUIPMENT * Home: List your requirements Mercury Wasp .5 c.c. Stunt 12,7 Celspray Airspray ★ RECEIVERS if and forward P.O. or Cheque. Junior Monitor Stunt 23 I D. C. Test Stand12 II E.D. Boomerang · Escapement To* I W IL L D O T H E R E S T Mercury Mac "A" T.R. E. D. 246 Jet Assembly Ready Wired 106 22/11 C.O.D. Service Available Monarch 2.5-3.5 Stunt Jap Silk, per panel ... E.D. Transistrol Rx 105/- 4 21/6 O verseas: List your requirements Thunderbird “B" T.R. Fuel Filters E.C.C 9SIB Rx. .. 85 -4 16/9 and forward British Postal Foeke-Wull 190 Stunt D. C. Fuel Cut-off E.D. Mk. IV Rx. 3 Reed 240 --r52/- Orders, International Money Sea-Fury 2.5-5 Stunt Starlon F.namcl. per tube ★ TRANSMITTERS * Order, Dollar Draft. Dollars' D.C. Chipmunk .5-1 c.i Class ‘‘A” Pilots 2/5. "B'* Boomerang , , 916 | 19/10 Commonwealth Notes (NO £S). Morcury P5I Mustang Elmic Limitank Mk. II Dual Purpose .103 · 23/5 Please allow for Pottages. Tax. Combatccr 2.5-5 c.c. Elfin Jet Assembly Mk. IV Complete . IS6 · 35/9 E. D. Clockwork Timer E.C.C. 1061 Hand 81,10 · 16/- I. Baby .46 c.c. * .,n ★ FREE FLIGHT POWER * Britfix Cement 7d., I/-, 1/8 E.D. Bee I c.c. Mk. II 46 4+10/1 Sabre F86E Ducted Fan 30 Britfix Fuel Proofcr 2/6 i f R/C ACCESSORIES * E.D. Hornet 1.46 c.c. 48 · 10/4 Skyskooter 48' 1-1.5 c.c. 30 - Mk. Ill Escapement .. 19 4/1 Dunlop 6010 J ' Rubber per lb. 15' Mk. I Escapement ... 48'-+10/8 E.D. 246 Racer 66 6— 14/5 Cardinal .5-1 c.c. 36- 17 4 15 c.c. T.R. Tanks ...... J/J E.D. 346 Hunter 64 6+14/5 Matador 47' R/C K.t... 25 10 Ripmax Servo Unit ... 47 3 I 9/1 E.D. Miles 5 c.c. 140 - 30 4 D.H. Tiger Moth 33'.. 34 2 SECOND HAND ENGINES Ripmax C/L Box . . 43/-+ 8/3 Mills Popular .75 c.c. 50, 9/8 Monocoupe 64' 1.5-2.5 692 Allbon Bambi .15 c.c. 0-5 M/A Meter ... 20 Mills Standard .75 c.c. 55/- 10/7 Aeronca Sedan 65' 1.5-2.5 69 2 Allbon Spitfire 37/6 E.D. Polarised Relay 30/— Mills 1.3 c.c Mk. II . . 75/- - 14/5 New Junior 60' ... 54' Allbon Merlin .76 c.c. 35/ Ripmax A 30 Relay 18 6 Frog 80 .79 c.c. 40 - s i- Mercury Agressor 39' 28 6 Allbon Javelin 1.5 c.c. 37 6 Ripmax Steering Unit SO 3+ 9/3 Mills 1.3 c.c. Mk. II .. 42 6 XFG I Valves ... 15,'-+ 3/- New Frog 149 Vibro 46 rr 7/3 ★ ★ GLIDER KITS Frog 250 BB ... 64 6 12/9 ★ ★ Allbon Sabre 1.49 c.c. 2716 My 10-Page Catalogue of Modelling Vcrosonic 46- 127 Full Lise forwarded request Goods will be forwarded upon Frog 500 Glow . 65 12/- Vortex 66" A.2 . 22 2 receipt of 3d. stamp. Elfin 149 Standard 47/4 9 /- Cadet 30* Trainer . . T H A T ENGINE YOU ARE NOT I can supply Spares for all Allbon J.B. Atom 1.5 c.c. Glow 50, Chief 64* A .2 ...... USING WILL BE TAKEN IN Elfin. Mills. E.D.. A.M.. and Frog Alien-Mercury 10 50/6-f- 8/- Magpie 24' Bcginnors PART EXCHANGE FOR ANY Engines from Stock. Allen-Mercury 2.5 c.c 54/- r 12 6 Martin 40' Intermediate MODELLING GOODS Alien-Mercury 3.5 c.c 58 , 6 , 13.2 Contest Empress A.2 29 6 IF IN GOOD CONDITION ir i f FOR BEGINNERS * * Allbon Bambi .15 c.c. 65/- 4 12 6 Contest XC4 Novelty 6 II ★ ★ X-ACTO TOOLS * ★ Frog Junior Kits, Scamp. Midge Allbon Dart .5 c.c. . 54/-+ 10 5 Inch Worm 64' A.2 ... 19 6 No. 1001 Knife 2 Blades 1/6 Skippy. Speedy. Sporty ... 3/6 Super Merlin .76 c.c. 44 - 8 7 Set of 4 Clamps . 12/6 Frog Senior Kits, Raven, Linnet Allbon Merlin .76 c.c. 37 6 o 4 ★ * PLASTIC KITS * ★ Saws for No. 5 Knife 2/- A 2/4 Heron. Tomtit. Widgeon... 4/6 Allbon Sabre 1.49 c.c. 44/ 8 7 I carry the full range of Frog. Balsa Stripper...... 5/- Polaris 2 0 'Solid Gl.der ... 21- Allbon Rapier 2.5 c.c. 64, 13/11 Lindberg, Airfix. Klccware and Spokeshavo ...... 3/6 K.K. Sedan. Ready-made ... 3/9 Allbon Spitfire Mk. II Lincoln Plastic Kits. Plane 5/6 Sander ... 3/4 ★ ELECTRIC MOTORS ★ I c 44/- 8/7 LINDBERG Thunderceptor 12/- Spare Blades, all Knives . 6d. Ever Ready 4j V...... 10/3 ELFIN 249 B.R LATEST 66 -+13/8 LINDBERG Convair V.T.O.... 12/- Gouges and Routers . I/- Electrotor 3-6 v...... 9/11 Oliver Engines as available. All N.B.— Eta 29. Series IV Engines Wood Carving Sets 23/- A 37/6 Taydol Supermarine 12 v. .. 79/2 Allbon. E.D. and Frog Water- arc now available from stock at Burlington Hobby Chest 87/6 Taycol Torpedo 6 v...... 34/- cooled Engines in Stock. 119/6 plus 26/10 P.T. X-ACTO LEAFLET ON REQUEST Taplin 4J v Precision 29 6 ★ ★ ★ HIRE PURCHASE TERMS aro available on all purchases i £2. Send for lists and simplified agreement form i f i f i r

GULL Sailplane

with rjlrti - lif'l p ln slir fnsrhif/e Length 11} in.; Span 15 in. Boxed complete, ready to fly. with own launching device; Price 4/11 AT YOUR MODEL SHOP

A Wimco Product by Sebel Products Ltd. “J " Division, West Street. Erith, Kent Tel. Erith 3020 ’Crams.: Sebclco, Erith 164 March. 1957

THE M ODEL SPECIALISTS

M odellers, let the postm an shop for you!

Send cash with order or pay postm an on delivery MY LATEST PRICE LIST 4d. po.t free

LINDBERG PLASTIC KITS CONTROL-LINE KITS Spitfire and M.I.G.-I9 «a. 7/11 K.K. R a n g er...... 12/9 TOUCH Spirit of St. Louis ...... 9/11 K.K. C h a m p ...... 12/9 Convair V.T.0...... 12/- K.K. J o k e r ...... 11/5 Thunderceptor ...... 12/- Mercury Wasp J-A ...... 12/7 F-100 Super Sabre . ... 13/11 M ercury Mac Class A Team Hellcat and T hunderbolt ea. 9 11 Racer ...... 18/— Corsair ... 9/11 New Mercury Mustang ... 32/6 Cutlass ...... 12/ Monarch Stunt ... 36/ Jap Zero (available March)... 7 II Veron Combatcer Stunt 27/3 Sluka Dive Bomber 12/— Frog Vandiver Mk. II 14/6 Look out for further additions to Frog Mirage for i c.c. 12/6 this range. . . . with Britfix colour dopes. N EW RANGE OF FROG Clean and bright» smooth and NEW ART ENAMEL 6 colours PLASTIC KITS for 1/3. Polystyrene Cement for Thunderstroak F84F. Super Sabre, easy to work with, they provide Plastics kits 6d ., 1/- and 1/6 per Skynight F3D, Lockheed Starfirc the perfect finish which all tube. F94C. Grum man C ougar F9F-6, Skyray F4D. All a t 2/6 each, good craftsmen expect I postage 6d. HEW FROG KITS Available in a wide range A ttacker ...... 5/3 TRI-ANG of colours. | oz. jar 8d., Thunder jet F.84-G ... 5/9 TRI-ANG RADIO CONTROL 2oz. jar 1/6, J pint tin 2/10d., SOON BRITANNIA l/96th scale. TRANSMITTER Mk. II £6/13/4 N.A. SABRE F86E 5/6: HUNTER 5/3 RADIO EC SLAVE (boats) £4/1/- k pint tin 5/-. Also in a METEOR 8 5 11; SEAHAWK 5/3. Radio RECEIVER (aircraft). . 89/6 D.H. 110 8/6 WHIRLWIND NEW Double pole Sensitive new handy can 1/-. HELICOPTER 5/9; JAVELIN 7/6: Relay ...... 31/4 CANBERRA 8/6. These kits are RADIO CONTROLLED BOAT complete with cement and stand. COMPLETE £15/2/- Special 'O*My*' enamels for above AEROMODELLER ANNUAL 10/ kits in all colours 8d. each. Postage FLYING SCALE MODELS 10/ on all Plastic Kits 9d. extra. Simple Radio Control ... Si- Contest Model Sailplane ... 5/-

NEW ENGINES REVELL PLASTIC KITS RAPIER 2.5 c.c. B.B. ... 79/11 Ford Fairlane Sunlinor ... 9/6 MK. 11 SPITFIRE ...... 52/7 Nautilus Submarine ... 7/6 D art .S c.c...... 44/S 1904 O ldsm obile 4/11 Super Merlin ...... 52/7 1911 Maxwell ...... 4/11 MERLIN .8 c.c...... 43/10 1913 M ercer Raceabout 4/11 Sabre 1.49 c.c...... 52/7 1914 Regal Colonial C oupe 4/11 NEW FROG 80 ...... 45; Roman Chariot ...... 7/4 The New ETA 29 ... £7/6/4 London to Birmingham NEW Allen Mercury 1 c x . 58/6 Tally-Ho Coach ... 7/6 NEW Frog 149 with Vibro- matic Induction ...... 54/9 SECOND-HAND ENGINES NEW Frog 2.49 c.c. B.B. ... 79/3 E.D. Baby .46c.c., E.D. Bee Ic.c* COLOUR DOpf FrogS0Mk.il 48 6 35/-; E.D. Racer 2.46 c.c. 50/-: E.D. Frog ISO Mk. II 49/- 3.46 c.c.. A M. 24 42/6: Frog 2.49 ■»Ol«uri wriv·» E.D. Baby .49 c.c. 55,-11 B.B. SO/-: Frog 50 and 150 35/- E.D. Bee 1 c.c. Mk. II ... 56 7 each; Allbon Dart .5 c.c. 40/-; E.D. H ornet 1.5 c.c. ... 58/4 Spitfire 1 c.c. 37/6; A M. 35 45/- E.D. Racer 2.S c.c. B.B. 80 11 E.D. 1.46 c.c. 37/6. Send for Alien-Mercury 25 ... 68/6 S/H Engine List. Alien-Mercury 35 ... 71/8 1 PAY CASH FOR GOOD Mills .75 c.c...... 59/8 SECOND-HAND ENGINES Full range of water-cooled Engines and Jetex Motors and Spares NEW RANGE OF PLASTIC KITS always in stock. Lincoln ST A R F IR E ...... 3/11 Lincoln VISCOUNT ... 3/11 CONSTELLATION ... 4/11 AIRFIX PLASTIC KITS CANBERRA ...... 4/11 H e l ic o p te r ...... T BRITFIX Spitfire ...... i All PLASTIC VINTAGE CARS 1911 Rolls Royce ...... j* a t Gloster Gladiator ...... | 2/~ 1911 Rolls Royce, Bentley; 1913 FREE, FULLY INFORMATIVE AND FULL Bentley ...... M ercedes; 1907 R enault; 1915 Fiat; COLOURED PRICE LISTED CATALOGUES A D arracq ...... J all a t 7/3 each. 1903 Cidillac; WL· ARE AVAILABLE TO RETAILERS Λ Galleon kits, Victory, Shannon, Model T Ford 1910: O ldsm obile O N R LOU ES I G olden H ind and Santa Maria 2 /- ca. 1904; a t 5 /- each. 1954 D Type Southern Cross boat kit . 4 11 Jaguar 7/11. 1903 Ford; 1900 Ferguson Farm Tractor ... 3;II Packard 6/3. 1905 H um ber; 1905 Black Pirate Galleon ... 13/11 Vauxhall at 7/3 each. Enamels 8d. 22 CASTLE ARCADE 1 PRODUCTS OF THE HUMBER CARDIFF 1 O IL Co., Ltd., M ARFLEET. H U L L March, 1957 165 DUQMa

(Jfou;-lo-do-it

P.O. BOX 160, NEW PLYMOUTH. NEW ZEALAND iJlagcissine of IA.cS. Calling all CYhoclelclon, Read FLYING MODELS, the only American magazine NEW devoted exclusively to model aviation! Every issue includes how-to- ZEALANDERS! bulld data on new model airplanes of various types (with full-size plans wherever possible) We ore ... worth-while hints ... photographs ... how- SOLE N.Z. DISTRIBUTORS for:— to-do-it information ... and features for sport a-plenty! J.B. Motors: 1.5 c.c. Atom Diesel com­ plete with airscrew and 2 oz. fuel, Now published every month. £3/7/6; 1.5 c.e. Atom C low com ­ Annual subscrlptlon:(l2 copies) £19 6 plete with propeller and 2 oz. fuel £3/17/6 Including Postage P.A.W. Trucut Airscrews, all sizes Celspray Spray Guns: Nos2<£ 3 15/6 ea. Mail your order and remittance today to: Dynajet Jet Motors: £12/10/- ATLAS PUBLISHING & DISTRIBUTING CO., LTD. M.E.W. Jet Motors: £6/10/- ( O a p t. A ) Fox Motors: Fox 19 £4/15/-; Fox 59 18 Bride Lane, Fleet Street, London, E.C.4. £10/5/- Frank Zaic’s Year Book 15/- Model News (a new Australian publica­ tion) 12/6 year post free. W e service everything we sell. W e refuse to 77?e AZoate/Zess stock lines we cannot service.

AEROMODELLER PLANS as advertised C A o / c e are available ex-stock. Add 3d. to price of plan for every 5s. or part of 5s. per plan.

NEW KITS AVAILABLE: As well as the Bcttair Berkeley C ESSNA 170 Radio Control 72" wingspan kit at £8/10/- with 200 shaped parts, and the SEACAT 4 8 ' wingspan Radio Control at £5/19/6, we now have the Bettair-Bcrkeley T H U N D E R B O LT P-47 with 40J" wingspan. Flying Scale Gas Model Kit for £3/17/6 with shaped parts.

DIESEL FUELS: W e now have 4 grades available from 3s. per 8 oz. bottle. Postage extra all lines. Always look for the name Equado when Pioneers. Leaders. Specialists buying balsa. It is your guarantee for (The Largest firm of its kind in the Southern Hemisphere) better model making — and costs no more. Importers. Manufacturers. Exporters E. LAW & SON (timber) LTD. The “BETTA” MODEL AEROPLANE SUPPLY CO. 272-274, HIGH STREET. SU TTON, SURREY 182-186 Devon St. East, New Plymouth, N.Z. TELEPHONE: VIGiUnt 8291-2

Kindly mention A E RO M O D ELLER when replying to advertisers 166 March, 1957

Modellers can be assured of personal service coupled with expert knowledge of aeromodelling requirements at any of the following shops. We invite bona-fide aero­ modelling traders to take advantage of this feature, in which space is available at moderate cost. ΤΪΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΗΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΙΜΙΙΙΗΙΙΙΚτ

«ILtiH Itt τ-ά«!Γ· r" 2524 LONDON] CENTRAL AIRCRAFT B. CUTTRISS & SONS MODEL AIRCRAFT SUPPLIES LTD. CO., PTY. MODELS AND HANDICRAFTS 5 P R IN C E S W A L K 171 N E W K E N T R O A D , S.E.I MELBOURNE, C.l 49-SI C L E V E L A N D STR EET The oldest established aircraft shop Australia's Main Distributor for: In London. '·Aeromodell r", ‘'Model M aker" and Call and see our Shop Service with satisfaction their Plans Service.

Tel.: M IDhnd M irtSIlireULiii 0972 HORNT ON'S CALEDONIA (Models and Toy*) L td . MODEL CO. BURLEIGH’S 32 STEPHENSON STREFT. BIRMINGHAM, 2. 303. EDGWARE ROAD. W.2 (Facing Stage D oor < >1 T heatre Royal) Model and Precision Engineers THE MODEL MAKERS’ PARADISE. 8 1 NAVIGAMON ST., BIRMINGHAM. 2. S PITT STREET. C.2 (adioinlng Qu«ie«s H otel) Our works at your service for engine Send 6d. fo r lists StockUta of Model A .Ircraf t . Railways repairs, rebores and rebuilds. BURLEIGH of Edgware Rd./Ltd. and Shik* Everything for beginner and enthusiast.

BLACKBURN M U I M M a - Q Guildford 2274 ΗΗ2ΗΒΙΗΗ» RAWCLIFFE’S PASCALLS THE MODEL SHOP F O R MODELS MODEL SHOP 13 BOOTLE STREET, 38 WHALL*-Y RANGE. BLACKBURN 105 W O O D B R ID C E R O A D . OFF DEANSGATE. MODEL BOAT KITS GUILDFORD MANCHESTER 2 AIRCRAFT KITS The shop devoted entirely to scale models The Model Aircraft Specialists. Mall ENGINES & ACCESSORIES o f all kinds. Kits—Materials—Accessories. orders by return. Pott Fret over £1.

Tel.: 7097 i H r e r a n Gaa2H3SSn»M ROLAND SCOTT RADAR COMPANY MODEL SUPPLY 2 O BSF R V A T O R Y R O A D STORES The Model S peclallst TSIN SHA TSUI. KOWLOON 17 8RAZENN0SE STREET. MANCHESTER 2 147 DERBY STREET The m ott complete stock o f oeromodclllng Manchester's Main "Mecca" for every equipment In the Far East. Run by make o f KIT. ENGINE & ACCESSORIES. lhe obvious shop for < oil Model A ltx a fi experienced modeller. Agent for Solarbo, Solarbo. BALSA, etc. Requirem Brltfi*. and O.S. Radio Equipments. Northern SKYLEADA Factory.

1 I M S M e K I n u u r n n WATFORD MEERS (Engin-eer»ng)LTD. T H E M O D E L S H O P . E. F. RUSS CRAMER’S 20 S U N S TREET. The Hobby Haven o f W est Hens. CANTERIBURY 97-101 B A TTER SEA RISE. 172· High Street. W atford (Under the Shadow < of th e Cathedral) S.W.II Near Watford High Street Station The largest stock o f Aeromodelling (Bakerloo), full stocks of ail that'· Equipment In Eost K lent. Your visit A COMPLETE STOCK FOR MODELLERS. new—special aeromodelling section on welcomed. By-return Postal Service. GIVE US A VISIT OR ORDER BY POST first Boor. Fishing. Trains, boats. Gamea

AEROPLANE PHOTOGRAPHS 1909-1956 1 orutiliontt o f S ale .... especially Germany. Japan, Italy, U.S.S.R. “■ This Periodical it sold tubiect to the following conditions—That it shall not. without the written consent of the publishers, be lent, resold, hired-out or otherwise disposed of by way of Trade except 12 (or I0/-; Catalogue, 650D items and 5 samples I0shillings "■ at the full retail price of 1/6 and that It shall not be lent, resold, hired- out. or otherwise d-tpoted of in a mutilated condition or in any H. J. NOWARRA, Berlin NW . 87, Rostockrstr 51. ΐ unauthorised cover by way of Trade: or affixed to or as part of any publication of advertising, literary or pictorial matter whatsoever. Germany ·" THE -AEROMODELLER'· 38 CLARENDON ROAD. WATFORD. HERTS. March. 1957 167

------CLASSIFIED J.\I) VKil l ISHJlK.\ TS — PRESS DATE for Inu., April. I9M, February 20, 1956. EIFFLAENDER REBORING SERVICE ADVERTISEMENT RATES: GIG FIELD BANK, CHESTER ROAD. MACCLESFIELD Private M in im u m 18 w ord · 4*., and 4d. per w ord for REBORES: BEES Seri·* I and PB ELFINS. 14/·. HALF each subsequent word. C.C.S, 20/·. O T H E R S 18/-, except those under .44 c.c.·, Trade Minimum 18 words 12**, and 8d. par word for which ar· 22/·. Prices cash with ord«r. Return postage free. each subsequent word. C.O.D. service 2/· extra. SPARES stocked and fitted. EN Q U IRIES: S.A.E. please for Immediate attention. Box numbers are permissible, to count as 6 words when costing PROMPT SERVICE with 30 days* guarantee. WELDING the advertisement. carried out at owners' risk only. W e do not bore ringed motors COPY and Box No. replies should be sent to the Classified Advertisement Dopratment, The "A iro m o d e lla r," 38 Clarendon Road, Watford, Herts. F O R S A L E Flash I I Speed record bolder Mike Bassett wins first London Hall-Λ (cam race at nearly 80 m.p.h. ! I Using super finished Tiger 6 x 9 (2s. 6d.) prop, of course. Be first ! ! !—fit Tiger and win frec-flight or controline. TRUCUT Expertly handfinished 8 x 3|, 8x4, 9 x 3—2s. 81d. each. 285 Gammons Lsne, Watford. PRECISION Selling up.—Frog ISO, 35s. Frog 250, 20a. Frog 50, very good, 30s. .· π..., cn. l· i% t _____ c f ' ι · π AIRSCREWS JIIIIIIIIIIIIIIIIIIIIIIKIIII for 1*5 c.c., 30s. One 5 ru/a meter, 5». Unfinished K.K. Piper Cub, other ^Illlllllllllllllillllllllllllllllllllllllllllllllllllllllllllillllllllllllllllllllllllllllllllllllllllllllll" kits, odd balsa odds/ends, 40s. Sell complete £17 or split. Wauchope, Flat 2, Longner Hall, Shrewsbury. I ENGLAND'S ONLY Oliver Tiger Mk. II, £4. Elfin 1-49, 35s. Radial 2-49, 40s. A11 bon Jam 15s., 35s. Apply M. Butler. 2 Gillian Ctoee. Aldershot, Hants. AVIATION BOOKSHOP E.C.C. 106JI Tclccommander Transmitter with spare valve, 951 B = The books you wsnt on Model or Full Scale Aviation are here— = we stock nothin* else. W e B U Y . S E L L or E X C H A N G E . S. Wood, 2 Fountain Cotts, East Beckham, Tonbridge, ntm . E Write or Call. OPEN ALL DAY SATURDAY ONLY. E.D. 2·46, 30s. Fuji 0 49 Outboard motor, 70s. Allbon Dart, 50s. = Beaumont Aviation Literature, 2a Ridge Avenue, E.C.C. Transmitter Receiver complete, many accessories, 120s. Box No. 511. = Winchmore H ill, London. N.2I. (Trolleybus 629, 641 or = Govt. Surplus relays Siemens miniature 3,400 ohm. 8». 6d. L ang, = Green Line Bus 715 bus the door.) 136 Clayhall Avenue, Ilford, Essex. ^iiiiiiiiiiiiimiiiiiimiiimiiiiiiiiiiiiiiiiiiiiiiMiimiiimiiiimiiiiiiiiiiiiiniiiiiiiiiiiiiiiMiM.- McCoy 60 Series 20, £10. Anderson Spitfire, £10. Atwood Champion, £5. Box No. 510. E.D. Everest 6 Reed receiver, £10. Mk. II Three-valve receiver. £5. rE . c . c .------Transistor receiver, £4 10s. Standard Escapement, 15s. Bonner Compound escapement, £5. Allbon Javelin, 30s. All perfect. D. A. Radio Repair Service Pierpoint, 17 Thornton Avenue, Streatham Hill. London, S.W.2. Tul. 9400. E.D. Baby, 30s. Racer, £2. American Airman’s Leather Trousers, Service and repairs promptly carried out on all Sheepskin lining 1 in. thick, umvom. Finest ever made, sun motor-cyclist 5 ft. 8 in. to 5 ft. 10 in ., £ 6. J. Whitehousc, 39 Constitution Hill, Dudley, E.C.C radio equipment. All work Guaranteed. Wore*. G. G. Davie, 7 Davidson Road. Thorpe, Norwich, Norfolk, E.D. Mk. IV 3 Channel Transmitter and Receiver. Aerial, Control Box, Escapement, complete outfit never used, cost £25; sell £15. Molcsey 4704. Norwich 33528. Brand new Mills 1*3, also Mills -75. Offers to Banks, 2 Ilfracombe Gardens, Ix>w Fell, Gateshead, Co. Durham. Brand new McCoy 29 lapped piston. £ 8 5s. Nearly new Super Tigre — AEROPLANE PHOTOGRAPHS------G.20S, £3 10s. Brand new K 8c B 15. £ 3 15*. A ndrew s. T h e S tores, OUR LARGE SELECTION of military and civil aeroplanes Blcdlow Ridge. High Wycombe, Bucks. are found of the greatest service by model builders for they New boxed American engines. McCoy 60 Redhead Series 20. £14. show aircraft in various positions, both on the ground and flying. McCoy 29 Redhead, £7 10s. Box 509. They include 1914-18 war planes, latest American and British W-in. 3-ply resin-bonded spruce, 45x54, 12*. (six sheets £3): 35x54, 8s.; lets, and there are thousands of titles. Pott free and including 10 x 54, 2s. 6d. Avdylacy, Huxley. Claygate, Surrey. Tel.: Esher 2653. Tax. 51 In. x 31 in. 7/6 per dozen. W e also list Ships, Railw ays Frog 500 Petrol, new, complete with coil, condenser, timer, switches and and Buses. Send I/· for specimen photograph and list, stating! two plugs. £5, or offer. J. May, Creag-Eiridh, Knoydart, Mallaig, the subject in which you are interested. ' I nvemcss-ehirc. REAL PHOTOGRAPHS Co. Ltd., Victoria House, Southportf4t E.D. Bee 1 cx. 32/6d., good condition -or offers. K.K. Phantom C/L 21'in. span, just started 17s. 6d., or offers. J. Cummings, 5 Strathdon Dr., Ncthcrlee. Glasgow S.4. WANTED E.D. Radio Queen with or without Miles Special (Ready to fly). A. McAra, EUlrig, Lowndes Street, Barrhead, Glasgow. Model SAND YACHTING ? U-Rcely handle. State condition and price. J. Walter, Moorfield, Mauchlinc, Ayrshire. Read all about this fascinating new sport In the Japanese F.84 Thunder let kit. for O.S. Pulse-Jet. Peter Donavour- Hickie, Bonners Place, Honey, Surrey. E.D. clockwork escapement wanted, please state price required. - MARCH - Pickering; 214 Halifax Road, Rochdale. Lancs 5 c.c. Spark motor. Preferably American Ohlsson 29 Roller Race Rotary Valve, but any good condition 5 c.c. considered. All replies answered K. Pickles, 7/ Queens Drive, Ossctt, Yorks. Pulse Jet. also Multi cylinder petrol motor, details and price. Croesley 35 Hawes Drive, Little Horton, Bradford. Wanted urgently, two Fenners-Pike servos. Please state condition and price. Box No. 508. Wanted urgently. Fox 59, new or as new condition, high cash price paid Collection London are*. D. G. Walker, 50 Valley Road, St. Paul's Cray. L aπ pass f7ads/s Orpington. Kent. BOOKS 1/72 Scale Balsa Solid Kits American Magazines. Year’s subscription Model Airplane News 35s. 21 W O R LD W AR II AIRCRAFT Full Catalogue free. Willcn Ltd. (Dept. 1), 9Drapers Gardens, London, including E.C.2. Illustrated Catalogue No. 13. Containing over 450 items of Government “DORNIER 217”— 7/- "FORTRESS''— 14/- Surplus and Model Radio Control Equipment, 2s. Post free. Refunded ‘'LANCASTER”— 14/- "STIRLING”— 12/- on purchase of Goods. 2a. 6d. overseas seamail. Arthur Sallis Radio Ready in April. Latest addition Control Ltd., 93 North Road, Brighton, 'Phone 25806. TRADE "WELLINGTON”—8/- New Frog Comet scries scale. Is. 9d. Republic ThunderstTeak. Douglas "JET” KITS, "VULCAN” DELTA II Skyray, Grumman Cougar, price 2*. 6d.. 8t Poet 5d. Complete kits include cement, transfers, canopy, stand. Send us your orders by post now "STARFIGHTER”. All l/72nd. for these new wonderful kit*. Messrs. Finister, 173 Ansty Road. Coventry. Modem Engines in excellent condition, sold or exchanged. All on 7 days If your dealer does not stock, write to: trial. Satisfaction guaranteed. "Engine Exchange.” 1 Thorpe Rd. Ave. Howden, Nr. Goole. C. P. D IX O N , King St., Southport. S.A.E. for price-list. 168 March, 1957

PLASTIC KITS A IR C R A F T t: C A R S ti BOATS WORLD’S LEADING HOBBY HOUSE’ REVELL. FROG. AIRFIX. LINCOLN. LINDBERG. G O W L A N D MERIT, GUITERMAN, KLEEWARE. Send SA.E. for List. ' ΡθίΚι'7 IMPORT - EXPORT NEW ! Plauic S U P E R -S A B R E F.IOO. Superb kit. Sixty-six precision detailed parts with movable controls, scale jot IMPORT: Manufacturers please send engino and undercarriage. 13/11 post I/· catalogues and samples for best U.S. representation. Aircraft Accessories: BALSA TOOLS— X-A cto 3/-, Swann M orton 2/6. EXPORT: Over 350 U.S. ranges from STANT and TRUCUT PROPS—5 ' to 13' diam . all pitches. 2/- to 3/2. FUEL TANKS—Plastic F/F from l/li. Metal, stunt, Irom 2/11. one source. One Invoice! One G LOW PLUGS—O hlsohn 6/8. JAP SILK— 3 6 ' wido 8/4 yard. Shipment! Plcait add Postage for Prompt Mail Order Service. POLK’S c r a f t HOBBIES INC. JONES BROS of CHISWICK 314 Fifth Avenue. New York City I S6 TURNHAM GREEN TERRACE. CHISWICK, W .4 phone C H I 0858 (I min. from Turnham Green Station) Est. 1911

Specialist in multiple channel tuned reed equipment All advertised E.D. R.C. equipment, engines and com­ st'ckto SECC0TINE ponents from stock. A*f4. * Kits of parts to make your own equipment. S.A.E. for price lists. - i t sticks Solenoid actuators ...... 25/- Motorised quick actuator ...... 35/· "U n iac" universal motorised actuator...... 45/- Six reed units ...... 60/- Eight reed units ...... · 70/- Miles 8 c.c. engines with throttle control £12/10/· A few only reconditioned 3 reed units...... 30/- RADIO & ELECTRONIC PRODUCTS (G. HONNEST-REDLICH) 8 STATION PARADE. SHEEN LANE. MORTLAKE, S.W.I4 Sole Manufacturers

ItolHPs IT’S NOVEL! f o r our full range of Model Kits, Engine and Aeroplane parts, send for IT’S EXCITING ! ! Bond’s Model Catalogue IT’S TRUE ! ! ! Price - 2/- This also contains particulars of Model Railway and Boat Fittings. IT’S BO.\l» S Ο’ ΚυΐϋΤΟ\' RO. Ltd. 357 EUSTON ROAD. LONDON. N.W.I *·<· «887 ρ ^ : EUSton 5441-2 WASTER THE AMATEUR ROD MAKER How many modelmakers go fishing? In thi» book. C. W . Taylor shows how the handyman DETECTIVE can develop the popular "do it yourself" cult and make his own rods and other fishing accessories to the highest professional standards, without the use of any elaborate workshop or special tools. Typical chapter headings indudo "Tools and Materials". "Fittings and Sundries", "Rod Building”, t h e s m u m m u v i i i i .v "Basic Rod Design", "Care and Maintenance of the R od". “ Making W ood and Light Alloy i i v i . v /.i m : c o v t a i m x g Reels", "Accessories". Clear and explicit drawings by the author. Bound in stiff card 'i'lU'E «ni.ni·: c a s e s with bright two-colour cover, jm I ^ 64 pages, sire 7J x 4| in., 28 / Qyl large line drawings. Price / model aeronautical press ltd., ORDER YOUR COPY TODAY 38, CLARENDON RD., WATFORD, HERTS

Kindly mention AE R O M O D E LLE R when replying to advertisers Every one of this .46 to 5 c.c. range is individually tested for accuracy and reliability up to a standard that ensures the greatest possible speed an 1 performance.

■ ■ ft-* E.D. 3.44 c.c. . "H U N T E R " Price £4.0.11 R B Sa (Water cooled Model K 3 £5.7.1) /

E.D . 2.44 c.c. "RACER" Competition Price £4.0.11 (W a ter cooled Model £ 5 . 7 . 1 )

Introduced in 1947 and has proved an ideal engine for control line, stunt and speed competitions. M ade British Speed Record 1950 for Control-line E.D. 0 44 flight 89.95 m.p.h. "B A B Y1 Gives 23 oz. static thrust and ■-■==-— iiff"' incorporates vernier compression B n adjustment. Bore: .5 in. Stroke: .625 in. Max. Μ ηΠ Η ^η^”1Η|||Ι|λ B.H.P.: II at 7,300 R.P.M. flji l T CS Height 3 in. Length: 4 in. Width: L . I {in. Price: £3:3:11 .. .jfc-

The general longevity of E.D. models speaks well for the foresight and skill ...r ‘ E.D. 1.44 c.c. of their designers and their efforts 1 "HORNET" have been amply rewarded by the J|l |l | Price £2.8.4 outstanding success of models fitted (Water cooled with E.D. Engines. I -lodcl £4.0.11) They arc now recognised all over the i M H \ ,k world as the finest, most reliable and efficient performers available. j f l H

P ric e £2 . 1 6 .7 (W ater cooled Model £3 . 17 . 10)

/ W rite for Now / Illustrated Folder gir- / ing full detoili o/ all E.D. 5 c.c. r E.D. Engines, Radio Control "MILES Units, Accessories and SpoiC SPECIAL” Parts, etc. P ric e £8 . 1 0 .4 Order from youi Model Shop. (Water coded Model £ . .4 ) 1 0 4 ELECTRONIC DEVELOPMENTS (SURREY) L T D * ^ ■>DI*VUOPM I N T ENGINE E R S 0*AM, S > ' 1 ■ISLAND FARM RD. WEST MOUSEY.' SURREY) ENGLAND. ■ .G\S«\L.', V S *

Made and printed in Great II itain by the Croydon limes Ltd . IU4 Ilea Street. Croydrn·· *°r the Proprietors. I he Model Aeronautical Press I :d . IX Clai enuon KoaJ. W attorj. Herts Publ.shcd by the Aiuiis Press ltd.. 42-44 llnp κη Street. London. S.E.I. to whom r‘* enquiries should tv aJJrctscJ. Registered at the G.P.O. for tramntissjnn b> Canadian Maxa/inc Post. ...in a KK rubber powered FLYING SCALE KIT

φ Full size plan φ Building and flying instructions Φ Plastic propeller and noscplug φ Plastic wheels Φ All wing ribs, formers, etc., clearly printed on high-grade sheet φ Ample best quality strip balsa Φ Covering tissue φ Sheet celluloid φ Cement φ Wire Φ Rubber motor

J U N IO R wttCTFXt w I FLYING SCALE SERIES' W ith full site plant and building ~nd flying instructions 15; N ie u p o rt 16 p a n S.E. 16 S o p w ith C a m e l

2Γ Piper Family Cruiser 20 Hurricane

18 Fairey Junior 20 Fairey Gannet 16 Fokkcr D-8 20 Globe Swift 19 Percival Provost 19 Stinson 19 Cessna MO

GET YOUR 1957 KEILKRAFT HANDBOOK & CATALOGUE Λ Λ ρ γ τ η η η ν I Containing all you need to know to start you off in · this great hobby. Price 1/3 at your model shop

18 F o c k e -W u lf 190 17" M .E. 10? Sole distributors in U.K. for BUY KEILKRAFT AT YOUR LOCAL MODEL SHOP ALLB0N & D.C. Engines lino model shop convenient, order direct from KEILKRAFT. Please add 6d. extra packing and pottage. ELMIC Timers and D/Ts. ELFIN Engines AER0KITS boat kits Also distributors for E.D.. E.C.C., BRITFIX. A M C O . and the famous L I N 0 B E R G Plastics Manufactured by E. KEIL & CO. LTD., WICKFORD, Essex Phone: Wickford 2316